William Gibson, one of the originators of the 'cyberpunk' science fiction genre, used the term "otaku" in his 1996 novel "Idoru". The meaning given, from a Japanese-translation computer function used by a character, was 'pathological techno-fetishist with social deficit'. The character so described spent much of his time online in a multi-user domain and subsisted on Ramen-type noodles and canned coffee. Although by Japan's rigorous social standards a "loser", the character was well-mannered and good-hearted.
"The otaku guys at my last school were into, like, plastic anime babes, military simulations, and trivia. Bigtime into trivia." -"Idoru", William Gibson
by Heather Cruikshank October 10, 2005
A female who is, in one manner or another, completely obsessed with anime, manga, and generally all things having to do with japan. They generally focus on these things to the exclusion of all else, including getting laid.
Back away, I am an Otaku and will pwn you with my bento! >.**
by Tess teh amazing and great December 25, 2010
The Anime Eletists or Anime Leet. People with years of "expirience" in anime-watching. To be an otaku, you must have at least 5 years of watching, 300 series & OAVs watched, more than half of them have to be subtitled or raw, you have to own at least 1 fansub, 1 ufo catcher doll, 1 doujinshi, 1 untranslated manga, 1 shitajiki, been to at least 1 con in full cosplay, one anime ost, knowledge of Japanese popular subcultures, a fleet of Japanese slang words, plus the ability to read katakana, hiragana, & instantly reccognize a few kanjis.
Someone who only watches dubbed anime on TV or borrows dubbs from their friends will never become Otaku.

Otakus have little to no tollerance for noobs, but will take one under their wing & teach them how to properly enjoy all Japan has to offer.

An anime fan is just a n00b, but an otaku is l33t. (noob/newbie) (leet/elite).
by Allaiyah September 09, 2006
A non-Japanese person who has an unhealthy obsession with anime or manga. See zealot, Wapanese, fanboy.
by otaku killer June 23, 2003
japanese for geek or nerd. Someone who will remain a virgin ( well very likely) and lives in a computer world. Social retard!
" Mervin, is way otaku!"
translation: "Mervin is a geeky, outcast to society and an embarassment to modern civilization!"
by the_rebsiqueen August 28, 2005
The word, "otaku," is often used to describe die-hard fans of anime and manga, meaning that these hard core fans live and breath to read Manga and watch anime.

as defined by wisegeek.com, see www.wisegeek.com/what-is-japanese-anime.htm for details
otaku isn't just a negative definition , but atleast this source can be trusted to be unbias.
by Bettermann March 10, 2005
These are people in american culture who watch anime all the time. They buy ever peice of anime style cloathing that they can get their freaky hands on. They stay at home, surfing the net, only socialising with people over message boards, and very rarely at cons, or conventions. They have no 'life' or a love life. They enjoy staying up late to watch that gundam episode for the 45th time.
People who go to the anime club at my school, they scare me.
by The Dutch Dictionary December 05, 2003
Someone who will never ever ever ever ever ever ever ever ever ever ever ever get laid and are a social fucktard. Honestly, if you have to beat of to an anime girl you should honestly just die because your life will always suc. And for God's sake move out of your mom's basement!!!!
If you do Cosplay, you are definately an Otaku. You suck at life.
by tnic May 30, 2005

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