The phrase pi yan pai dui is written in Chinese as a crude joke about a butt party, and the clip circulates online mainly as a short meme sound rather than from a widely documented film or show. Its rise fits the soundboard culture of very brief, out of context clips that can be shared, replayed and dropped into chats in an instant. Because it needs no context, creators reuse it across edits and streams, and its short length keeps it popular for quick reactions.