In Britain, people who wear anoraks in their social life are often stereotyped as trainspotters or persons with unimaginative and dull pastimes/hobbies.
In slang an anorak is a person, typically a man, who has unfathomable interest in arcane, detailed information regarded as boring by the rest of the population, and who feels compelled to talk at length about this information to anyone within earshot.
The closest American slang is perhaps nerd which is applied to bookish students. Anorak is not generally applied to students; and the anorak is more of a trivia-freak than an overly studious worker. A geek is a person typically expert at, and intensely focussed on, technical equipment, particularly computers; again this is not exactly an anorak — the anorak offers overly detailed discussion and arcane trivia on "hobbyist" topics.
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An anorak or parka is a type of heavy jacket with a hood, often lined with fur or fake fur, so as to protect the face from a combination of freezing temperatures and wind. This kind of garment, originally made from caribou or seal was invented by the Caribou Inuit, Inuit (Eskimo) of the Arctic region, who needed clothing that would protect them from wind chill and wet while hunting and kayaking. The word anorak comes from the Kalaallisut word anoraq, while the word parka is of Aleut origin. Certain types of Inuit anoraks have to be regularly coated with fish oil to keep their water resistance.
