The name comes from the internet's playful misspelling of Among Us, the social deduction game where players hunt for an impostor among cartoon crewmates. As the game exploded online, fans turned its characters and the word suspicious into a stream of memes, edits and remixes, and amungus became a shorthand joke for anything that looked even slightly sus. It spread through gaming videos, TikTok edits and meme compilations, and it still pops up because that single reference instantly signals a joke to anyone who has played or watched the game.