Noot Noot is the signature sound of Pingu, the young penguin from the Swiss stop-motion television series Pingu, which began in the late 1980s and became popular around the world for its wordless, expressive humour. Pingu communicates largely through honks and noises rather than real speech, so his catchphrase became instantly recognisable. Clips of the show spread through YouTube edits, memes and short-form video, where louder and angrier versions were remixed for comedic frustration. It remains popular because the sound is short, familiar and funny even to people who never watched the full series.