The origin of mwoah gertuku is not clearly documented, and the phrase itself appears to be playful nonsense rather than a line from a known film or show. Clips with this kind of exaggerated kiss noise and mumbled ending circulate on soundboards and in short form video, where they are shared as quick reaction sounds. Its appeal is its brevity and ambiguity, letting creators drop it into romantic jokes, teasing edits and absurd memes without needing any setup or explanation for the audience watching.