The Joker is Batman's archenemy from DC Comics, and his manic laugh has become one of the most recognisable sounds linked to the character across comics, animated series and live-action films. Online, the laugh spread as a reaction sound for villain moments, plot twists and dark jokes, and it is now a staple of meme edits, gaming clips and Halloween videos. Unlike the lighter Chipmunk Laugh, this version is slower and more menacing, which is why creators keep returning to it when they want a joke to feel sinister rather than silly.