The word oink is the English onomatopoeia for the short grunt a pig makes, a spelling that has long been used in children's books, cartoons and farm stories to write the sound down. Recorded pig noises became a staple of sound libraries and later of soundboards, where a single clean grunt could be replayed instantly for comic timing. Online, creators keep using this clip because it needs no setup, reads clearly even on small speakers, and instantly suggests a pig, a farm or someone behaving greedily.