The phrase qué es eso simply means what is that in Spanish, and the stretched version has circulated online as a reaction audio in Spanish speaking meme culture. Its popularity comes from how universally the confused tone translates, even for viewers who do not speak Spanish, making it easy to reuse across short videos, streams, and group chats. Rather than being tied to one specific scene, it has spread as a standalone sound that creators drop in whenever something odd, gross, or nonsensical appears on screen.