Add Yahoo as a preferred source to see more of our stories on Google. We'll cover what the acronym means, examples of how it can be used and variations of common ways to reply to "ISTG." "ISTG" means ...

When you're texting or opening up your social media apps these days, it seems like there's almost always a new acronym, hashtag or Gen Z slang word that can catch you off guard. From acronyms like ...