Online, Caua Criminoso circulates as a compact reaction sound rather than a clip from a widely recognised film, show or song, and its appeal comes from the nickname itself doing the joke. Shared through meme pages and short video edits, it is used to tag a person or character as the playful villain of a moment, especially in Portuguese-speaking meme humour where a nickname can carry the whole punchline. Its short length makes it easy to reuse across different videos without needing context, which helps explain why it keeps appearing in new edits.