The phrase is informal Brazilian Portuguese, with “p” as shorthand for “pra,” meaning to ask someone to tell something properly. As a short clip, it circulates as a reaction sound for moments when a story, joke or explanation has been told badly. Its appeal is practical rather than tied to a particular show or celebrity: anyone who has heard a friend rush, skip details or lose the ending will recognise the situation. That familiarity is why creators keep using it in short videos, edits and chat replies, where a spoken correction can be funnier than a written comment.