SUS, short for "suspicious," is a term commonly used in gaming and online communities to describe someone or something that seems untrustworthy or questionable. It often implies that a person's actions or behavior raise doubts about their intentions, leading others to be cautious or skeptical. In popular culture, especially in games like Among Us, players frequently use the term to identify teammates who may be acting oddly or not contributing to the group's goals. The term has since spread beyond gaming, becoming a part of everyday language to express doubt or concern about someone's credibility or motives.