The phrase comes from everyday Malay as spoken in Malaysia and Indonesia, where dunia kejam ni is a common way to complain that life feels unfair. Online, the clip spread as a reaction sound on short videos rather than from a single confirmed film or show. Creators reuse the full twenty seconds because the shift from complaint to reassurance gives an edit a tiny story arc. It stays popular for the same reason other sad reaction sounds endure, sitting close to the emotional damage meme in how it turns disappointment into comedy.