The evil laugh is one of the oldest shorthand sounds in comedy and villainy, familiar from cartoons, stage melodrama and countless films and games where a scheming character celebrates a plan coming together. Online, short clips of the laugh became a reusable reaction sound, dropped into memes, edits and streams whenever someone wants to signal playful scheming or mock triumph. Its appeal is its instant readability: no explanation is needed for viewers to know the character is up to something, which is why it remains a staple in prank videos, Halloween content and gaming highlights.