You’ll find it all over the internet, from social media platforms like twitter and instagram to direct messages between friends. The”I” is the person who is saying it, while”F” is an expletive “F” can be an exclamation point added to the expression. The ISTG definition includes a short acronym for a phrase that reads as ‘I Swear To God’. ISTFG. Clear Of Patient Diagnosis B. "Meaning; ISTG: I Swear to God: ISTG: Immigrant Ships Transcribers Guild: ISTG: Information Storage Technology Group (University of Twente; Netherlands) ISTG: Inter-Site Topology Generator: ISTG: Implicit State Transition Graph: ISTG: Integrated Systems Tech Group (Tampa, FL) ISTG: Innovative Science and Technology Group (est. ISTG. One such popular slang on platforms like Snapchat is ‘ISTG’. Having a parental control app on your child’s phone will give you. What Does ISTG Mean? ISTG is an acronym that stands for “I Swear to God”. Matching search results: Since the STG meaning is often expressed fully when in a verbal conversation, the term STG should only be used in casual conversations via text or on. This abbreviation is commonly used in informal conversations on various digital platforms, such as text messages,. Prison gang. “ISTG” stands for “I swear to God,” and it’s commonly used in texting to express the seriousness of a situation or to assure someone that you’re not joking when. " “ISTG” meaning over text message. TikTok lingo is hard to keep up with. So, the next time you see someone using “istg” in a message or post, you’ll know exactly what they mean. Every TikTok user's FYP. Avoid using this abbreviation in business or professional settings because it is so casual. ISTG can be used to express extreme seriousness, anger, or surprise, and is usually used outside of serious religious contexts. Going deeper into its meaning, ISTG sounds quite similar to OMG ‘Oh My God!’. It is commonly employed in informal chats, videos, and posts to show seriousness and truthfulness. Definition of ISTG in Slang/Internet Slang. ISTFG, I can’t believe she actually said that to me. ISTG Meaning= ThreatUse Cases & Examples. ISTG means I swear to God. ’. The term is primarily used to emphasize a point you’re making and can reiterate anger or annoyance. Let’s talk about the other meanings of this common abbreviation and find out what it means for different people in different contexts. 2. Swear to fucking god. In texting lingo, “istg” simply stands for “I Swear To God”. Alternatively, you might say ISTG to show exasperation or frustration at something someone is telling you. It is a commonly used slang expression used to emphasize that someone is telling the truth, or to add emphasis to a statement. "I swear to. This acronym often highlights the sincerity, seriousness, or exasperation of the person using it. "I swear to. ”. This initialism should be avoided in professional situations or in conversing with someone who is religious. " ISTG is used to add emphasis to a statement (usually a promise, threat, excuse or apology), or as an interjection which expresses surprise, skepticism or exasperation (similar to OMG ("Oh My God!") ). While the presence of the word “God” might indicate some religious connotation, it’s not a religious term at all. new search. ” It is often used to emphasise the truthfulness of a statement or convey the seriousness of a situation. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. This. ” Kids often use this to express frustration or exasperation. ” This abbreviation is commonly used in informal conversations on various digital. "I swear to God" isn't just texting slang – it's used in everyday conversations to emphasize the truth at hand. The”I” is the person who is saying it, while”F” is an expletive “F” can be an exclamation point added to the expression. It's a close relative of the OMG (Oh My God). This expression is used to emphasize the truthfulness or seriousness of a statement. This is a group of teachers that are more than friends. It’s used to convey a deep sense of seriousness about a situation or to emphasize a point being made. It can be used to convey extreme seriousness, exasperation, or surprise, and is usually used outside of a serious religious. It can be used to express emotions, surprise, or sudden kind of feelings. What does Istg mean in text message . ”. More violent then just I Swear To GodISTG is an acronym that is short for “I swear to God”. ”. The phrase was later. It can also be an expression of surprise or. Annoyance and Assurance Another ISTG How to Use ISTG One of the hottest internet acronyms among today's teenagers is ISTG. What does B) mean? Back when emojis weren’t a thing, ‘emoticons’ were used to add more emotions to the text. Guarantee. showing only Slang/Internet Slang definitions ( show all 7 definitions) Note: We have 1 other definition for ISTG in our Acronym Attic. B) used to be the symbol of a person wearing sunglasses with a smile on his face. ” It is commonly used in text messaging and online chat to emphasize the truth or sincerity of a statement. For example: What does ISTG mean? ISTG is an acronym that means I swear to God. Here's what this versatile slang term means and how you can use it in your messages and social media posts. What Does ISTG Mean? In internet chatting and text messaging, the acronym “istg” actually means the phrase “I swear to God. The expression “I swear to God” is used for centuries and originates directly from the Old English word “swear” which means swearing. What does LFG ð mean? LFG as “let’s freaking go” has since become widespread in texts among friends as a way to excite or “hype up” one another about a particular event or situation. It’s also like STG. Summary: · The added I at the beginning just refers to the person that is saying this, so ISTG means “I Swear To God”. ISTG stands for I Swear To God. They are there for each other on the good days and the bad days. What does ISTG mean? ISTG means “I Swear To God”. ISTG Meaning= Threat3. It could be used to show how excited they are or to express. STG means different things to different people but its most common meaning is ‘Swear To God’. One of the main uses of ISTG is in text messages or chats, either between friends or in a. The phrase “I swear to God” has been used for hundreds of years and is basically taken from the Old English word “swear” which means an oath. The slang abbreviation ISTG is frequently used as an interjection to express emotion or as an attestation of honesty. It can also be used as an expression of sincerity, such as when a user is making a promise or expressing their. ONB is an abbreviation commonly used in texting, which stands for “Oh No Baby”. ILYSM means "I Love You So Much. ISTG Unveiled: Introduction to the Slang. The abbreviation “ISTG” is a shorthand. ISTG and OMG can also be used interchangeably often. ISTG stands for “I swear to God. It is an expression used to emphasize the truthfulness or sincerity of a statement. It’s similar to the term ‘ONG. This is a casual phrase that many people use both online and in real life (imagine someone exclaiming “I swear to God!” when they’re frustrated or emphasizing a point). Also, Check What Does SNM Mean In Texting? What Does ISTG Mean and How Is It Used in Real Context? The use of shortened phrases is a popular way to communicate in text messages and online conversations. ISTG has multiple definitions that can be used in various settings. Meaning. ABC means asking another player (or telling another player you’re ready) to make an offer, trade or perform a task in Roblox, such as roleplaying in a game. TLDR meaning: too long; didn't read. On the internet, there’s a lot of jargon and abbreviations that often confuse even the most seasoned internet user. I’m beyond shocked. " People use it in various places on the internet to tell someone to stop talking or as a gut reaction to something offensive or mean-spirited. Origin of ISTG. Social media platforms: Snapchat, Instagram, Twitter, TikTok, and more. This abbreviation is typically used to express surprise, confusion, disbelief, or. '. The phrase “so what” is often used to express indifference or dismissiveness about the topic at hand. ETA meaning: estimated time of arrival. Meaning. This initialism should be avoided in professional situations or in conversing with someone who is religious. ”. It is very similar to ISTFG meaning, however, there are additional letters added within the acronym. ISTG stands for: I Swear To God. This can be seen in phrases like: “ISTG, I’m always here for you” or “ISTG, I’ll never forget what you did for me”. You might learn your child is using this slang term by chance when a text pops up on the phone screen. The Meaning of ISTG in Text. Chronic Osteomyelitis Pathology Degree Embed Share an image of ISTFG » Click to view: Hearing impaired tip:. It represents an empathetic or mildly shocked response to unexpected news or events. Specifically, as internet usage is increasing daily, people. For example, if someone decides to message you with insulting comments about your hair, then you might reply with "STFU. Definition of ISTG in Slang/Internet Slang. Start the day smarter. It is very similar to ISTFG meaning, however, there are additional letters added within the acronym. TLDR meaning: too long; didn't read. Use ISTG to show you’re not joking about something, or to express annoyance or frustration with something (or someone). IYKYK meaning: if you know, you know. ISTFG means “I Swear To Fing God” and is typically used in informal texting to express frustration or disbelief. ”. The phrase originated as a method for people to express a greater level of certainty about a statement they’re making in a conversation. It is used to emphasize a statement, a promise, or a claim, to express frustration, or to make a solemn vow. It comes from the courtroom oath that traditionally said, “i swear by almighty god that the evidence i shall give shall be the truth, the whole truth, and nothing but the truth. It’s also like STG. It is used to emphasize a statement, a promise, or a claim, to express frustration, or to make a solemn vow. Complaint Of Patient Data C. . Pinky promise. 1 definitions of ISTG. " It is an internet acronym used in online chat to express frustration, surprise, or vehement assertion. Well, fret not – I’m here to help unravel the mystery for you. What Does ISTG Mean in Texts or on Social Media? ISTG means “I swear to God” in text messages and on social media platforms like TikTok, Snapchat, Twitter, Instagram, and more. This initialism should be avoided in professional situations or in conversing with someone who is religious. ISTG meaning is “I Swear To God” and is one of the most widely used acronyms in the English language. Get all the news you need in your inbox each morning. What does istg mean in text. While some text codes (like brb, lol, and omg) are simple ones that parents can understand, it can be difficult for parents to understand many codes teenagers use nowadays. IYKYK meaning: if you know, you know. A very dramatic phrase to be used only in exceptional circumstances. Person1: I'm so exhausted. Here's what "ISTG" means and how you can use it in your next text exchange. STG: You can swear to god when you are frustrated or in exacerbation. Read Also: What does CFS mean on Instagram? Common Uses for ISTG . I swear to fucking god. It stands for “I swear to God. In summary, ISTG is an acronym widely used in informal online communication. Its meaning is “I Swear To God,” and it is commonly used to add sincerity or emphasis to a statement. -ISTG that was the best pizza ever! -I put your racket back in your duffle bag istg. The acronym ISTG is commonly used in text. Pushin P is a popular phrase in the Bay Area and Texas that was popularized by Atlanta rapper Gunna. It can be used to convey sincerity, make promises, express annoyance, and more. Further Reading: What Does NFS Mean: Here Is All-inclusive Information You Need to Know. Since this is a very casual acronym, avoid using it in. ”. This phrase is often used to express frustration or exasperation with a situation or to emphasize the sincerity of a statement. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. IMO meaning: in my opinion. ISTG is commonly used in text messages and other social media conversations as a way to emphasize the truth or sincerity of a statement. When used in text conversations, ISTG retains its original meaning of “I swear to God. In a different context, “sw” can also mean “someone who. ISTG is a slang abbreviation used in online messaging and texting that means 'I swear to God. Jamie Grill / Getty. ABC – This doesn’t stand for anything. What Does “ISTG” Stand For? “ISTG” is an acronym that stands for “I Swear to God. Usage: “Oh nice, you finally finished it! Welcome to the club B)” What does BB mean?What Does ISTG Mean in Texts or on Social Media? ISTG means “I swear to God” in text messages and on social media platforms like TikTok, Snapchat, Twitter, Instagram, and more. It's not typically used in a religious context. ISTG is an acronym used in texting, which stands for “I swear to God. What Does ISTG Mean In Texting? Snapchat represents a real-time multimedia communication platform that takes a step beyond traditional messaging applications. ” Origin of ISTG. Even though the phrase includes “God,” its meaning and uses aren’t considered religious. ISTG Meaning What Does “ISTG” Stand For? If you’ve ever seen “ISTG” in a text message or on social media, you might be wondering what it means. It’s often used as an exclamation or a way to emphasize something and can be written in lower or upper case letters. What does GM mean in text from a guy?What does df mean in texting? In the realm of texting and digital messaging, “df” usually stands for “da fuq”, a slang and casual form of saying “the fuck”. ISTG. ISTG is short for "I swear to God. It can be used as an exclamation, where users are expressing disbelief or shock. Gunna explained that the ‘P’ stands for ‘player,’ although it can also stand for. Likewise, if you have ever seen the text code "ISTG" in texting and wondered what does ISTG mean in text. Do you know what ISTG means in a text message? Watch this video to find out when to use ISTG in a text message and what it means!What Does “ISTG” Stand For? “ISTG” is an acronym that stands for “I Swear to God. ISTG is an acronym that stands for “I Swear To God”. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. suggest new definition. It can be used to express emotions, surprise, or sudden kind of feelings. ” Origin of ISTG. ISTG is an acronym that is short for “I swear to God”. I Swear to God. ”. Key Takeaways: ‘ISTG’ stands for “I Swear To God” and is commonly used in text messages and online chat. The texting term ISTG, which means "I Swear To God," tells people that you really do mean what you're saying. More violent then just I Swear To God Learn what ISTG means in this quick and easy guide! Find out what the abbreviation stands for and how to use it in real life with this simple explanation. The origin of ‘ISTG’ can be traced back to the phrase “I swear to God,” which. This phrase can be used to swear truthfully without having to use a more serious swear word, such as the word "God". 2006)Texting with friends is the best way to use this term. LFG meaning: let's freaking go. The term comes from “shipping” within fandom culture. Usually, students or the young generation use this acronym. ”. This phrase should only be used in casual conversation. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness. showing only Slang/Internet Slang definitions ( show all 7 definitions) Note: We have 1 other definition for ISTG in our Acronym Attic. -ISTG that was the best pizza ever! -I put your racket back in your duffle bag istg. Chronic Obstructive Pulmonary Disease D. ATP meaning: answer the phone. Throughout the years, a variety of terms have arisen which make it easier to communicate online. Specifically, as internet usage is increasing daily,. " The abbreviation ILYSM is used with the meaning "I Love You So Much" as an expression of affection. By swearing to God, you make a sacred oath that most people respect more and therefore, are more. It is used to express frustration, anger, or disbelief. ISTFG. ISTG Meaning= Threat Use Cases & Examples. ” How to understand Texting Abbreviations!! LOL and LMAO, SMH, FFS… and all the other ISTG Meaning A short video summarzing the most common. This phrase is used to emphasize the truth of a statement or assertion. ISTG Meaning. " ISTG is used to add emphasis to a statement (usually a promise, threat,. . While it may seem like a phrase that you would use in casual conversation, it can be so much more than that. By using “ISTG,” individuals can emphasize the sincerity or truthfulness of their statements, especially when sharing surprising facts or. 查看翻译. You will find information about the origin and other possible meanings in all types of information on this acronym, including its. While the presence of the word “God” might indicate some religious connotation, it’s not a religious term at all. 2. This expression is most likely something you've heard in ordinary conversation. It can often. Expand Your Lexicon: Discover 5+ Similar Words for ISTFG When it comes to texting, understanding similar. ISTG is an internet slang initialism that conveys earnestness, annoyance, or surprise. In conclusion, “ISTG” is an acronym that stands for “I swear to God. The abbreviation ISTG is widely used in text messaging and online chat with the meaning "I Swear To God. ISTG is often used in informal conversations, texting, and on social media platforms. Istfg Meaning Is: Istfg stands for “I Swear to Fucking God. U Jelly has become a very popular expression, and because of its viral spreading nature, it has achieved meme status. It is commonly used as an exclamation or interjection. Today, I'll walk you through what ISTG means in text and other text. When someone doubts something you said, using ISTG is a way to make a solemn oath that most people respect and are more likely to believe. It could be used to define the frustration or annoyance you might have towards something or somebody. How Is ISTG Used? Use Cases & Examples. ISTG Meaning. So, if you ever heard OMG (O My God), another popular acronym, ISTG won’t surprise you anymore. – What does istg Mean in Text – ISTG is a popular online abbreviation among today’s youth. One of the known acronyms is “ISTG” or “istg”. But while the slang term ISTG is harmless, other teenage slang terms could indicate that your teen is talking about risky behaviors or communicating with potentially dangerous people. What Does Istg Mean In Text? I swear to God ISTG means “I swear to God. It is an acronym used to emphasize a belief in or commitment to the truth of a statement. OTP meaning: one true pairing (a couple that fans prefer to all other. What Does ISTG Mean? Introduction. It’s a widely used acronym in text messaging and online chatting on social networking sites. -ISTG that was the best pizza ever! -I put your racket back in your duffle bag istg. The “baby” part of the phrase isn’t a literal reference to a child, and. In summary, ISTG is an acronym widely used in informal online communication. Today, I'll walk you through what ISTG means in text. "I swear to. For example, three sample text messages using the abbreviation ISTFG could be: 1. ISTG stands for “I swear to God” and is often used on Snapchat to emphasize a point or express strong emotion. ISTG stands for "I Swear to God. ”. ”. It is a reference to swearing or commitment to God that is not something to take lightly as it is a risk that the person who is saying it could be punished in the event of lying. new search. Here’s our round-up of the latest Roblox slang. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. Correct: ISTG Correct: istg Incorrect: iSTG Usage Use of the abbreviation can be found in the following places. Whenever a TikTok user opens their app, they are directed to their For You Page, which is a stream of videos that TikTok thinks that user will like. You can use it to show your deep frustration, attest to the truth of something, or underline your beliefs. Here’s what this multifaceted slang term means and how you may. ISTG is simply an acronym that means I swear to God. Sub the Gamer security threat group. In simple terms, “istg” stands for “I swear to God,” a popular expression used to emphasize the truthfulness or intensity of a statement. The slang abbreviation ISTG is frequently used as an interjection to express emotion or as an attestation of honesty. They prefer to work in traditional organisational environments, with people who take their. It is commonly used in text messaging to express the seriousness of a situation or to assure that a statement is not a joke. The abbreviation ISTG is widely used in text messaging and online chat with the meaning "I Swear To God. Further Reading: What Does NFS Mean: Here Is All-inclusive Information You Need to Know. This abbreviation is commonly used in informal conversations on various digital platforms, such as text messages, social media posts, and online forums. A. 1 definitions of ISTG. What does STG mean?U Jelly is often used to goad someone online or in-person because you possess an article that they do not have, or because you have attained some kind of gamer achievement or minor online fame. The media could not be loaded, either because the server or network failed or because the format is not supported. The phrase “I swear to God” has been used for hundreds of years and is basically taken from the Old English word “swear” which means an oath. Some of these words and acronyms are used on other video games and social media platforms too. Use ISTG to show you’re not joking about something, or to express annoyance or frustration with something (or someone). However, as with many other abbreviations meaning "I love you," it should not. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. ISTFG. ”. ISTFG means “I Swear To Fing God,” a phrase used to emphasize sincerity or seriousness when making a statement. 4. Promise. Usually used after saying something ‘cool’. It may sound like a new term to some, but this one is very familiar to social media users. ISTG Meaning. Similar to “I Swear To Fucking God” istfg, in that it is an escalation of the original term “I Swear To God” istg. It can be used to convey extreme seriousness, exasperation, or surprise, and is usually used outside of a serious religious context. Usually, students or the young generation use this acronym. Abbreviation of I Swear To Mother Fucking God. What Does “ISTG” Stand For? “ISTG” is an acronym that stands for “I Swear to God. It’s an acronym that people use to express the seriousness of a situation or to emphasize that they are not joking. ”. ISTG stands for “I swear to God” in texts and on social media apps. What does ISTG mean in the text? Ans. So, if you ever heard OMG (O My God), another popular acronym, ISTG won’t surprise you anymore. ISTG is simply an acronym that means I swear to God. This should not be used in any formal setting, no matter how informal it may seem, via social media or text. When someone uses ISTG, they are essentially emphasizing. "I swear to. The slang abbreviation ISTG is frequently used as an interjection to express emotion or as an attestation of honesty. ISTG is an acronym used for “I Swear To God. ISTG Meaning= Honesty or Certainty2. It’s a direct and sometimes blunt way of communicating that the information just shared doesn’t impress, affect, or matter to the person asking “so what. What Does ISTG Mean? In internet chatting and text messaging, the acronym “istg” actually means the phrase “I swear to God. Page ContentsWhat Is ISTG Meaning1. ISTJ types like to have clear goals and realistic deadlines, and to work with factual data to solve problems and monitor progress. It is often used in informal conversations, especially when expressing frustration or disbelief. Start the day smarter. 3. ISTG is an acronym that stands for ‘I Swear To God. This is also very similar to. Confused about slang like cap, HB, ATP, and more? We defined some popular TikTok acronyms for you. Capitalization The slang term and abbreviation “ISTG” is typically spelled in ALL CAPS or all lowercase letters. ISTG=Make a PromiseWhat Is ISTG Meaning in SlangIstg Slang Usage (Examples and Use Cases)ISTG Meaning on TikTokISTG Meaning SnapchatFAQs on ISTG Meaning1. ISTFG, if you don’t stop playing your music so loudly, I’m going to lose it. Like, "ISTG, if I get one more. This is a common acronym that is used online, typically in text-based communication. I just won the jackpot on the lottery ticket I bought yesterday, ISTFG! 5. HMU meaning: hit me up. I swear to fucking god. For example, they might say “ISTG this homework sucks. I Swear to God. ISTFG. Simply put,. "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're. ISTG can be used in various contexts and can have different implications depending on the conversation. While some text codes (like brb, lol, and omg) are simple ones that parents can understand, it can be difficult for parents to understand many codes teenagers use nowadays. HMU meaning: hit. Looking for online definition of ISTG or what ISTG stands for? ISTG is listed in the World's most authoritative dictionary of abbreviations and acronyms ISTG - What does ISTG stand for?Definition of the term. This phrase has a couple of variants, S2G and ISTG, and is frequently used in texting or on social media. "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're. OFC meaning: of course. In contrast to standard text or audio messaging apps, Snapchat offers the unique ability to share fleeting live video messages that vanish as soon as they are. ISTG is an abbreviation commonly used in text messaging and online communication, particularly among younger generations. It can be written in both lowercase “istg” and capital “ISTG” letters. This phrase is typically employed to express surprise, disbelief or concern over a given situation. What does ISTFG mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: ISTFG. Overall, the acronym STG stands for “swear to God. If you see someone using ISTG when texting, they’re probably emphasizing how serious they are about something. -ISTG that was the best pizza ever! -I put your racket back in your duffle bag istg. ISTG is used to express frustration or annoyance at something or to show emphasis on a statement. The slang abbreviation ISTG is frequently used as an interjection to express emotion or as an attestation of honesty. This phrase is often used on social media while making public posts or in private chats. It is typically used to show appreciation of an act of kindness by a loved one. This is only for close friends. It is commonly. ILYSM can be used to express profound affection. ETA meaning: estimated time of arrival. suggest new definition. There needs to be a TikTok user manual that includes a glossary because new abbreviations and slang words are constantly being churned out and I, a millennial, cannot keep up. Simply put, “ISTG” stands for “ I swear to God . I swear to God. Essentially, ISTG is a shortcut way of saying "I. ISTG Meaning= Expression of Disbelief4. This initialism should be avoided in professional situations or in conversing with someone who is religious. What Does Istg Mean? The acronym ISTG stands for “I swear to God. STFG stands for Super Teacher Friends Group. Matching search results: Since the STG meaning is often expressed fully when in a verbal conversation, the term STG should only be used in casual conversations via text or on social media. Its meaning is “I Swear To God,” and it is commonly used to add sincerity or emphasis to a statement. FYP means For You Page. ISTG is an acronym that means I swear to God. Testify. This is also very similar to. Summary: · The added I at the beginning just refers to the person that is saying this, so ISTG means “I Swear To God”. FOMO meaning: the fear of missing out. What does OTP mean in texting? “OTP” means “one true pair/pairing,” according to Merriam-Webster. It's used express emotional sincerity or to seem intimidating. What Does ISTG Mean In Texting? ISTG is an acronym used for “I Swear To God. Get all the news you need in your inbox each morning. ” Definition: Istfg is an acronym for “I swear to f Up. Likewise, if you have ever seen the text code "ISTG" in texting and wondered what does ISTG mean in text. OFC meaning: of course. The ISTG acronym is commonly used in response to a person who doubts something that you said. STFU is an acronym that means "shut the fuck up. GTFO can be used to express disbelief or displeasure. “I swear to God” is a common phrase that people use to show that they are telling the truth or to express their sincerity. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. Use Cases & Examples. ”. I swear to f**king god (ISTFG) is an abbreviation used to express exasperation, disbelief, or agreement. Use Cases & Examples. It can be a powerful tool for self-motivation and encouragement. As in, I swear that actually happened. It is a stronger version of the phrase “I swear”.