This sound is associated with Peter Griffin from the animated TV series Family Guy. Online, short clips of Peter's laugh have circulated for years in meme edits, reposts and soundboards because the voice is instantly recognizable and easy to drop into comedic timing. People use it when a moment feels childish, smug or absurd, especially in low-effort joke videos and reaction posts. Its staying power comes from how quickly the laugh communicates the exact tone of a dumb joke landing a little too well.