Crowd booing is one of the oldest audience reactions in broadcast entertainment, heard whenever a live crowd turns against a performer, player or decision. Short clips of that reaction have become a staple of online soundboards and meme edits, where a ten-second version is long enough to cover a full reaction without looping. It survives because the sound needs no explanation: listeners instantly read it as rejection, disappointment or playful mockery, which makes it useful across sports, gaming, comedy and reality television edits.