The phrase is everyday Brazilian Portuguese and is understood literally as an attempt to fool a father figure, which gives the clip its teasing, caught in the act feeling. Its exact recording source is not widely documented, so it circulates mainly as a short messaging and social video reaction audio rather than as a quote tied to a known film or show. That portability keeps it useful, because creators can drop the line onto any unbelievable story, excuse or prank and viewers instantly read it as disbelief.