anorak

anorak

/ˈænəræk/

1 (especially British English) a short coat with a hood that is worn as protection against rain, wind and cold

My Mum made me take my anorak in case it rained.

hikers in anoraks and walking boots

2 ​(British English, informal) a person who spends a lot of time learning facts or collecting things that most other people think are boring

Word Origin

1920s: from Greenland Eskimo anoraq. Sense 2 dates from the 1980s and derives from the anoraks worn by trainspotters, regarded as typifying this kind of person.