One that fucks fun.
Caitlin won't go to the movies with us. It was going to be a really fun night, but then she became a funfucker.
by DanQuinn July 31, 2009
Someone who ruins the fun by not letting it happen or not taking part in it because of their non-festive attitude.
James is a funfucker - he bailed on our hangout just because he didn't want to race.
by B.Tang December 17, 2010
A fun fucker - a person that fucks the fun out of everything.
Thanks, Roy, you fun-fucker...now I wont bother to spend $8 to see Clint Eastwood die in Gran Torino
by 私はTodd February 06, 2009