Sussy and sus come from Among Us slang for suspicious behaviour, which turned into a huge meme format around impostors and calling out strange actions. This button version mixes that language with an exaggerated anime scream, a combination that spread through soundboards, TikTok edits and Discord pranks. Clips like the sus clapping sound show the same joke format, where a short reaction is reused as a punchline. It stays popular because one press instantly signals suspicion without needing any setup or explanation.