Among Us is a social deduction game developed by Innersloth and released in 2018, which exploded in popularity in 2020 as streamers and friends played it together online. The word sus, short for suspicious, became its signature slang for accusing another player of being the impostor, and clips of the game flooded TikTok, YouTube and Twitch. The short start sound travelled with those edits, becoming shorthand for doubt and hidden motives, and creators still use it today to signal that something, or someone, cannot be trusted.