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!
Person B: Oh no! I forgot them at the house!
Person A: Fuckdude!
by Aidensgrand February 26, 2011
A girl who is hot, flirty, lively and sexy when clothed, but once you get her in bed, she's like a warm ham with a pulse.
That girl Shawonka sure has the curves and knows she's a fine piece of ass, but bro - what a fuckdud. It was like an extra pink corpse in my bed.
by sparhavoc September 09, 2018