Nom nom is a written representation of eating sounds that has been used in comics, cartoons and internet slang for decades to show a character enjoying food. As short audio clips became popular on soundboards and in video editing, the spoken version turned into a go-to meme sound for eating scenes. Creators reuse it across gaming videos, pet clips and food content because the meaning is understood instantly, even without context, and the brief loopable rhythm fits quick cuts and reaction edits.