Someone who is hopelessly devoted to something and will like anything associated with thier particular thing.
That damn fanboi only likes that game cause Capcom made it.

The only reason he bought that car is cause he is a Japanese fanboi.
by Jevin June 19, 2003
Get the fanboi mug.
Geek Term related to forum users who think a product/company/person can do no wrong.
No matter many bugs Star Wars Galaxies has, a fanboi will alway defend the developers.
by Mutant May 24, 2004
Get the fanboi mug.
A person who posts in internet forums with a bigger signature than what he posts. Signature sometimes contain full computer specs, 1-2 images (that contain the LOGO for the company/game/other the person is a fanboi of)
LOL! You suck, I have no problems!
ASUS P52 Infin1ty
AMD Athlon X2 64BIT 5000MHZ WEEK16 PLANT 2 HAYCHIN PROVINCE The Peoples Democratic Republic of China
4GB UNFABOTA Infin1ty RAM 1-1-1-1/700MHZ WEEK6 Nangon Plant, OSAKA JAPAN
by Alexander B. October 17, 2005
Get the fanboi mug.
1. Alternate spelling for fanboy, generally implying youth
2. A hot, gay fanboy, usually young, or a twink
1. That Seth on the O.C. is such a fanboi!
2. I'm heading for the bars-- hopefully I'll pick up a cute fanboi.
by Nathan K. Claus November 2, 2006
Get the fanboi mug.
A fanboi is a gaming term for someone who immitates a person/clan that he or she hates in order to annoy or cause trouble.
"Oh don't worry about that guy, he's not really part of our clan, he's just a wannabe fanboi"
by idiotfeatures October 11, 2006
Get the fanboi mug.
An extreme fan or follower of a particular medium or concept, whether it be sports, television, film directors, video games (the most common usage), etc.

Known for a complete lack of objectivity in relation to their preferred focus. Usually argue with circular logic that they refuse to acknowledge. Arguments or debates with such are usually futile. Every flaw is spun into semi-virtues and everything else, blown to comedic, complimentary proportions.

Known for using the phrase
"Object of affection = Best Ever"
However, while people only really say that as hyperbole, fanboys truly believe it.

Troll the internet to spread the gospel.

Insult/chastise others for using public forums to express an objective opinion, no matter how constructive or, respectful it may be. (Go ahead and admit that it's a good game/movie/etc. This fact and anything else will be promptly ignored in favor of cherry picking the negative, and beating you over the head with it.

Tend to resort to petty annoyance replies when backed against the wall. Usually grammar attacks and non-replies.
"Final Fantasy VII is the best RPG ever!"
"Ocarina of Time is the best game ever!"
"Linux is the best OS ever!"
"Xbox is the best console ever!"
"Dragonball Z is the best show ever!"

The sad thing is, fanboys don't realize, that these companies that fuel their passion, don't really give a damn about us. To me, defending a multi-national corporation like their your own family, is ridiculous. These organizations don't come to your house and help you when you're sick, they don't help you move, or drive you to the airport. They don't support you in any way. It's a business, not a friendship. As soon as you can no longer buy their product, you disappear to them.
by Lig Na Baste July 11, 2008
Get the Fanboy mug.