Sussy is internet slang for suspicious that spread widely through Among Us gameplay, where players accuse each other of acting strangely during a round. The word became a meme in its own right, used far beyond the game to tease anyone who looks guilty, secretive or up to something. Short clips built around the word are now a shorthand in edits and reaction videos, because audiences recognise the joke without any explanation. Its staying power comes from that simplicity: one familiar word instantly frames a moment as a playful accusation.