The laugh comes from SpongeBob SquarePants, the long-running Nickelodeon cartoon centred on the optimistic sea sponge living in Bikini Bottom. Fans clipped this high-tides moment because the laughter feels longer and more exaggerated than a normal cartoon giggle, and it quickly spread through reaction videos, edits and soundboards as shorthand for finding something hysterically funny. It remains popular because the voice is instantly recognisable even without the visuals, making it an easy way to signal that a joke has completely landed.