Nelson Muntz is the resident bully in The Simpsons, the long-running American animated sitcom, and his mocking ha-ha became one of his defining catchphrases early in the show's run. The laugh is almost always aimed at Bart Simpson or another character right after something goes wrong for them, which made it easy to lift out of context. As short clips and soundboards spread online, the two-beat laugh became a universal reaction sound for schadenfreude, still used today because it instantly signals teasing without needing any dialogue or explanation.