Peter Griffin is the central character of Family Guy, the animated sitcom created by Seth MacFarlane that premiered in 1999. Short voice reactions from the show have circulated for years as standalone meme clips because the delivery is instantly recognisable even without the scene. This one spread through meme pages and editing communities as a response to comments that cross a line, similar in use to other reaction staples like the bruh sound. Its popularity comes from how clearly the shock reads in audio alone.