Onnanu circulates online as a short meme sound rather than as a widely documented clip from a named film, show or song, so its appeal comes from how creators reuse it rather than from a single famous scene. Shared through soundboards and short-form video edits, it has found a small but steady audience among viewers who recognise it on hearing and reuse it for reactions and jokes. Its length makes it practical for quick edits, and its distinctive feel helps a familiar gag land again without needing extra explanation.