The rubber chicken sound comes from the squeaky novelty toy modeled after the long-running rubber chicken comedy prop. That prop became a familiar visual gag in stage comedy and party-shop humor, and the toy's squeal naturally turned into a reusable sound effect online. In short videos and meme edits, creators use it as a quick audio punchline for anticlimax, clumsy moments and absurd reactions. Its staying power comes from being instantly recognizable, very short, and funny even without any setup.