What does Istg mean in Gen Z?

Could you please clarify what "Istg" stands for within the context of Generation Z? It seems to be a term that's popular among this demographic, but I'm not quite sure of its exact meaning or origin. Is it an acronym for a specific phrase or concept that's commonly used in online communication or social media platforms? Understanding its significance and usage could provide valuable insights into the linguistic trends and cultural norms of this generation.