The phrase is Brazilian Portuguese slang built around rebolado, a rolling hip movement associated with dancing, and pai used here as a boastful self reference rather than a literal father. The clip circulates as a short standalone audio for dance jokes, edits and reaction posts, where the meaning is clear from tone even for non Portuguese speakers. Its popularity comes from that mix of confidence and silliness, making a brief spoken line reusable whenever someone wants to announce a move before performing it for laughs online today.