JAPAN:In Japanese was "Otaku" very polite form of "you" (literally your house). During the time the meaning has changed to hardcore fan of something usually manga and anime. Otaku has became used in meaning : nerd or jerk. Nowadays in Japan is the meaning returning back to non-offensive usage because of econimic trends.

ELSEWHERE: Out of Japan is the term "Otaku" used in the meaning of hardcore fan of anime and Manga. Many of anime fans call themselves otaku despite knowing it's meaning in Japan.
I'm otaku and i'm proud of it.
by xpozitron April 11, 2005
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A life form that dies if it cannot watch anime
My roommate's a complete otaku and cried for a week because Naruto was over
by epic_pandemic December 18, 2014
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An extremely negative Japanese term, referring to a shut-in or someone with no social life. It also implies that the person's entire life is molded around fictional characters (usually anime and manga).
In America, the term has been embraced by anime fans, who (as they do with many Japanese words), use the word incorrectly as a positive term for fanboy/girl.
1. "God, that kid is such an otaku. He won't leave the basement unless it's to buy new Dragon Ball fansubs."
2. "I, like, so totally love Sailor Moon! Serena rawks! I am, like, the ultimate Sailor Moon otaku!"
by Charon May 21, 2003
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Otaku in japanese is used primarily to describe someone who is obsessed with something to the point of un-healthiness. They lose their grip on reality so to speak. 'Gun-Otaku,' one who is obsessed with guns. 'porn-otaku,' one obsessed with porn. so on and so forth. The american meaning, maybe its used else where to...I dunno. any way, otaku over here is someone who likes anime a wwhhoollee lot, though they normally lead a normal life (unlike jap. otaku). Not really a bad term, though many see it as such.
No example. Its self explanitory.
by Kiwi Lord July 01, 2003
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Japanese word meaning obsessive fan of anything.Somewhat derogatory meaning that you put your interest above all else. Westerners tend to use it without the derogatory connotations. Rather, an otaku is someone who is a dedicated fan of anime and/or manga.
Example? Example? Example?
by Liam March 02, 2005
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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
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If you call yourself "otaku" and you're not a young Japanese person, odds are you're a weeaboo.
by ElMitchoBandito June 22, 2017
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