Anorak (slang)

"Anorak" /ˈænəræk/ is a British slang term which refers to a person who has a very strong interest, perhaps obsessive, in niche subjects. This interest may be unacknowledged or not understood by the general public. The term is sometimes used synonymously with "geek" or "nerd", or the Japanese term "otaku", albeit referring to different niches.