The nom nom sound is a long-running cartoon shorthand for eating, familiar from animated shows and internet videos where exaggerated munching signals hunger or delight without any dialogue. As a short meme clip, it spread through soundboards and reaction videos, where creators reuse it whenever a character, pet, or streamer eats something quickly or greedily. Its appeal is simple and nostalgic: the repeated syllables are instantly recognisable, easy to lip-sync, and funny even without context, which keeps it in rotation for food jokes and hungry reactions.