The title ratero is Spanish slang for a thief or pickpocket, and the clip circulates online as a reaction sound rather than as a documented quote from a known show or film. Short shouted warnings like this travel well on soundboards because the meaning is clear even without context, and the second version suggests users kept reposting variations. It stays popular for quick visual gags about stealing, cheating or running away, where a longer explanation would kill the timing and a single word does the whole job.