Brainrot is online slang for low-effort, repetitive internet humour that floods short-form feeds, and this Danish phrase translates roughly as shut up with that brainrot. It fits a wider reaction trend where creators use a blunt native-language line to call out overused memes without needing a long explanation. The clip is short enough to drop between jokes, over gameplay or on top of a montage, and its appeal comes from that shared feeling of being tired of the same references. That makes it easy to reuse whenever a new wave of brainrot takes over.