anorak
noun
[ ˈanərak ]
• a waterproof jacket, typically with a hood, of a kind originally used in polar regions.
• a studious or obsessive person with unfashionable and largely solitary interests.
• "with his thick specs, shabby shoes, and grey suit, he looks a bit of an anorak"
Origin:
1920s: from Greenlandic anoraq . The British English informal sense dates from the 1980s and derives from the anoraks worn by trainspotters, regarded as typifying this kind of person.