The phrase is Spanish slang for calling someone a rat, a word used across Latin America and Spain for a person who is stingy, sneaky or disloyal. As a short audio clip it circulates as a reaction sound in Spanish-language meme and short-form video culture, where a blunt line can do the work of a rant. Its appeal is its directness: listeners understand the insult instantly, even without context, and creators reuse it whenever a clip shows selfishness, betrayal or a cheap trick. That instantly readable quality is why it keeps appearing in roasts and reaction edits.