With no single credited source, mua mua mua has circulated online mainly as a short, searchable kiss sound rather than a quote from a film or show. The spelling mirrors the sound itself, which makes it easy to find and share across meme pages, reaction videos and short-form edits. Creators keep returning to it because three kisses are funnier and more emphatic than one, and because the meaning needs no translation: affection, flattery or a joke goodbye lands instantly, whatever language the viewer speaks.