Cookie Monster is the blue, cookie-obsessed Muppet from Sesame Street, the long-running American children's television series that first aired in 1969. His exaggerated eating became one of the show's most recognisable running jokes, and clips of his munching later travelled far beyond children's television through memes, reaction videos and short-form edits. The sound remains popular because it is instantly understood across languages and ages, needing no explanation to signal hunger, greed or pure snack joy.