This sound comes from Among Us, the social deduction game by Innersloth that first released in 2018 and exploded in popularity during 2020. As the game became a streaming and meme staple, the impostor reveal audio spread far beyond gameplay clips. People began using it as shorthand for suspicion, betrayal and “sus” behavior in short videos, reaction edits and joke callouts. It remains popular because the cue is brief, instantly recognizable and easy to time with a visual reveal, much like a danger alarm sound effect meme.