1. FAT ASS FINGERS: a name given to one because of their hilariously oversized, sausage-like fingers

2. Acting in a way that just fucks up the situation.
Extremely popular in the Buffalo suburbs.
Fafs are often seen in pictures giving the shocker.
Note: despite the fingers, fafs still manage to get laid.
"Dude, get your fafs out of my drink"

As the faf drives by a hot girls house, he points out the window with the fafs yelling, 'yo, is that her house' As this happens the girl walks outside thus embarrassing everyone in the car. He has committed a faf, or we say he faf'd it up.

Also common is the faf of the night. This occurs when one drops a beer, soils themself, gets their fake id taken or any other fuck up.
by lockport April 7, 2005
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When you say someone/something is 'Fit As Fuck'

*Can sometimes be mistaken by Fat As Fuck, Beware!*
#1: "Hes FAF!"
#2: "Yeh He's FAF, And I don't mean Fit."
#1: "Hahaha! Yeh Innit."
by Roo777 August 17, 2006
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this word means "funny as fuck", a new common word people use instead of "lol". -Jonathan made it up =)
"Omfg, that was faf yesterday!!"
by Marissa Marie October 24, 2008
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FAF,the act of using an internet chat forum

After a brief moment of clarity one night on the Channel 4 Big Brother Forum (a rare phenomenon indeed) some one said we are ADDICTED to this forum...we are forum addicts.... FORUM ADDICTS FOREVER.......and so FAF was born and dedicated to the hardy folk of foruming.
FAFfer-forum user
Multi FAFfing-using more than one forum simultaneously.
by Beware of the loons May 11, 2006
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Someone who messes around doing a lot of activity and takes a long time to get job done
Instead of fafing around, I'll get an expert to fix it
by Julian May 8, 2003
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