Sussy is an extended form of sus, slang popularised by the online game Among Us after its surge in 2020, where players called out anyone who looked like the impostor. Combined with bruh, a long running reaction word for disbelief, sussy bruh became a catchphrase in gaming clips, TikTok edits, and meme compilations around 2021. The phrase spread because it sounds inherently unserious, turning a real accusation into a joke. It remains used as shorthand for spotting odd behaviour, especially in games and short social videos where context is minimal.