Among Us launched in 2018 from developer InnerSloth and exploded in popularity during 2020, when streamers turned its emergency meetings into a constant source of accusations. Sus became the game's shorthand for suspicious behaviour and quickly escaped into wider internet slang, appearing in captions, chats and short meme clips far beyond the game itself. The phrase is often grouped alongside other reaction staples like bruh because both work as instant, one-word judgements. Its staying power comes from how easily it labels any odd behaviour without needing further explanation.