This sound comes from Nelson Muntz, the bully character in The Simpsons, whose mocking laugh became one of the show's most recognisable audio cues. The series began in 1989, and Nelson's “Ha ha!” spread far beyond TV through reaction clips, soundboards and short meme edits. It stays popular because the meaning is immediate even without context: someone messed up, and the laugh delivers the punchline. Online, it often fills the same reaction role as spongebob boowomp, but with a meaner, more teasing tone.