The full form of "Istg" is "I swear to God".
This slang phrase is often used in online conversations, particularly in text messages and social media posts. It expresses strong emotion or emphasis, usually when someone is surprised, frustrated, or trying to convince someone of something.
Examples:
- "Istg, I saw a unicorn in my backyard!"
- "Istg, I told you I didn't eat the last cookie!"
- "Istg, this movie is the best thing I've ever seen!"
While "Istg" is commonly used in casual online communication, it's important to be mindful of its context and audience. It's generally best to avoid using this phrase in formal settings or when communicating with people you don't know well.