Dont use the word Otaku.
Agreed...
The term was invented for Japanese youths who forsake everyday society and retreat into a world consisting of Anime (the likes of which most American fans will never even come close to seeing) in an almost cultish manner.
That's not entirely accurate. You can be an "otaku" in just about anything. Mecha-otaku. Hentai-otaku. etc.
It implies an unhealthy obssesion/fanaticism, and is not limited only to anime.
"The law of probabilities decreed me guiltless of his blood for in all my small experiences with guns, I had not hit anything I had tried to hit, and I knew I had done my best to hit him." ~ Mark Twain