The airhorn began as a practical signalling device, the loud compressed-air horn used by fans at sporting events, on boats and at celebrations to be heard over a crowd. As short video editing grew, creators lifted that same blast into meme edits, where it became a shorthand for hype, victory and sudden interruption alongside other loud reaction sounds like a buzzer. Its appeal has lasted because the noise needs no context: one blast instantly signals that something big, funny or unexpected has just happened.