The exact origin of 'la pu de la Petra' is undocumented, but the clip circulates as a Spanish-language meme passed between friends and soundboard users, tagged simply around the name Petra. Like many inside-joke meme audios, it likely started as a private recording or voice note that was funny enough to share, then spread through group chats and meme pages where the unexplained name became the joke itself. Its continued use comes from that mystery: saying it with confidence makes any silly edit feel like part of a bigger joke.