So called because, while visiting the pirate radio ships, they were known for wearing anorak coats due to the cold and windy climate of the North Sea.
Yeah, he always was an anorak.
2. A Western imitation of such garment, full of cheap insulating material, and lined with fake fur.
3. Garments worn by trainspotters, etc.
4. Train spotters, plane spotters, pylon spotters, bus spotters, mail van spotters, hearse spotters, Formula 1 spotters, 666 spotters, etc.