Noot Noot is the signature call of Pingu, the claymation penguin from the Swiss children's television series Pingu, who communicates largely through honks and expressive sounds rather than words. Clips of Pingu, especially his excited Noot Noot, spread widely on YouTube and later on TikTok, where editors turned the honk into a reaction sound for surprise, confusion and lighthearted mockery. Variations like What the Noot play on that familiarity, using the same instantly recognisable noise as a punchline. It remains popular because the sound needs no translation and reads as funny in almost any context.