One who is obsessed with something and thinks people who don't like it are inferior.
That stupid Final Fantasy 7 fanboy stabbed me in the balls today for liking Final Fantasy X better.
by DJ gs68 September 16, 2003

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A (typically inept) volunteer salesman.
I'm so sick of Bill trying to convince me how good his crappy Zune is. He's such a Microsoft fanboy.
by cfta August 13, 2012

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Anyone that says they are a fanboy in a sentence, or claims that he/she is annoyed with a board topic being created for the 200th time is a fanboy.
"Being annoyed with the fact that this is at least the 200th time this topic has been made hardly makes me a fanboy."
by darthsweetness April 21, 2009

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The nickname for anyone who is all of the below:

1.)Annoying, irratating, loudmouth

2.)Poser, trend follower, lacks own distinct poersonality/taste in music

3.)Engages pointless idiotic conversation just to make human contact with people that hate him

4.)Everyone hates him... if you dont yet trust me you will see why they do

5.)A person so physically and socially repulsive the only positive aspect of sitting next to him is the use of his fan
"Who is that singing along to Rush?"
"oh it's fanboy"

"thats tits yo!"
"There he goes fanboy again, disgusting another girl"
by Bob Mould November 16, 2005

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A pneumonic device in AP style for remembering words that receive commas just before them when conjoining two independent clauses. (for, and, nor, but, or, yet, so)
This is an independent clause, but this is also an independent clause.
by Tom March 30, 2005

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A male person who is extremely into certain fandoms. Are sane compared to fangirls. Usually like yaoi if they like anime manga and video games.
That fanboy loves yaoi.
by EdgeworthFucker July 01, 2011

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A zealot or fanatic of a brand name, character, or product. Also known as otaku in Japanese.
Anyone who is a fanboy of Final Fantasy 7 and every Final Fantasy game/movie after that is not a real videogamer to begin with.
by AYB February 19, 2003

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