It's a slow day at Star Industries, Dan, so I took a few minutes and looked up the word "anoraks". First of all -- I guess the real meaning of the word isn't a meaning -- it's a brand of jacket/coat/shirt/something. But the term has come to mean (you ready for this?):
"The nearest equivalent non-British slang term might be "nerd". An anorak is literally a hooded waterproof coat, and the slang term was originally applied to trainspotters - people whose hobby is hanging around railway stations, monitoring the arrivals/departures of various trains and writing down their serial numbers in little notebooks. I swear there are such people, and their hobby requires them to wear suitably draught-proof clothing. By extension it has become applied to anyone with an obsessive interest in a subject that is too technical or boring for anyone else to know much about. By the way, the title of the film Trainspotters is a reference to the interest the characters had in the traffic up and down the lines in their arms!"
It's tough, being the guy that gets to look up these obscure words, but I thought that, in the spirit of being a community-minded guy, I should take on the task.
Happy New Year, boys and girls!