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1.
college age male interested in beer, boobs, and the like. Similar to a frat boy but not necessarily a member of the greek system. Begins most thoughts with "Fuck dude. . . "

Things a fuck dude would say:
- "Fuck dude, last night I was sooo drunk . . fuck dude."
- "Fuck dude I was totally going to fuck this chick, but her friend cock blocked me, and I was all 'fuck dude!'"
"Man, that apartment complex is full of fuck dudes."
by Tim Hemesath July 27, 2004
 
2.
The definition of a Fuckdude is somebody that is always screwing things up for you or a group of friends.
Person A: Hey man, do you have the tickets?

Person B: Oh no! I forgot them at the house!

Person A: Fuckdude!
by Aidensgrand February 26, 2011
 
3.
a faggot that doesn't want to say his name but feels like defending his girl even though he doesn't have the balls to talk to you.
Fuck dude you're a fucking pussy suck my dick you won't even say you're fucking name some shit you care about her.
fuck dude i dont even feel like talking to you you're so full of shit.
by carl fucking hecker October 21, 2006