The exact original source of this clip is not clearly documented, so it is best understood as an online reaction sound built around a familiar Portuguese expression for pain. Ai que dor is a common everyday phrase in Brazil and Portugal, and pairing it with the name Zuzu gives the short audio a repeatable, meme-like identity that travels well in captions and comments. It circulates mainly as a short voice reaction for comic mishaps, falls and exaggerated injuries, where its theatrical delivery does the storytelling without needing any context from a longer video.