Pupupu has circulated online mainly as a short, searchable soundbite rather than as a clip tied to a widely documented film, show, or song, and its appeal comes from how instantly recognizable the repeated syllable is. Because the sound is so brief, it travels easily between short videos, reaction edits, and chat messages, where people reuse it without needing any context to get the joke. That portability has kept it in rotation for light, low-stakes humour, especially in edits that need a fast audio cue to signal silliness, surprise, or gentle mockery.