The phrase itself is everyday Spanish, roughly meaning why are you looking at me so much, idiot, and that plain confrontational meaning explains how the clip travels online. It is shared mainly as a Spanish language reaction sound, dropped into chats and edits when someone wants to turn a simple stare into an awkward moment and an over the top argument. Its appeal comes from the delivery rather than a famous source, so it sits naturally beside other meme reaction clips even without a known character or scene attached to it.