Caiu, relaxa is a short Brazilian Portuguese phrase that translates roughly as fell, relax, and it circulates online mainly in gaming and meme edits. Its appeal comes from the contrast between a sudden fall or failed play and a voice that sounds completely unbothered, a tone that fits the deadpan humor of short-form clips. Because the line is brief and easy to understand even without full Portuguese, creators reuse it across gameplay fails, funny falls and lag-related jokes, keeping it in rotation long after its first uploads.