1. Fat As Fuck is what i've always used it as, however, apparently it can also stand for:
2. Fit As Fuck
2. Fit As Fuck
by Maxx69 January 11, 2009
Get the fafmug. Jeff: Wanna hear a joke?
Stan: sure :p
Jeff: Why do women make better soldiers?
Stan: why lol
Jeff: Cos they can bleed for a week and not die.
Stan: ur jokes r a faf xD
Stan: sure :p
Jeff: Why do women make better soldiers?
Stan: why lol
Jeff: Cos they can bleed for a week and not die.
Stan: ur jokes r a faf xD
by Ieatdog June 12, 2017
Get the Fafmug. 
Fake as fuck. Originating in the Northern Nevada area, used when a friend goes behind your back or goes around your words.
by JMoney420Baller August 10, 2017
Get the FAFmug. "Filthy as Fuck." Expression is used when describing someone whose gross, repulsive, nasty, dirty, rachet; someone you wouldn't touch with a 10 foot pole.
" Ew better get away from him! I heard at the Delta Chi mixer he screwed half the sorority in the coat closet." (On and around your coat.) "That dude is FAF."
by Jennyfrdablock December 10, 2014
Get the FAFmug. Stands for Fake Ass Friend. Used to call someone out for being fake, sketchy, unreliable, or flaking on something. Not as insulting as a fake ass bitch or a fake ass hoe, but a gender neutral way to describe your frustrations with a friend.
"I can't believe she ditched my birthday party to hang out with her ex. What a faf."
"He posted the group photo where she looked the ugliest. That was such a faf move."
"You're a faf for leaving without me."
"He posted the group photo where she looked the ugliest. That was such a faf move."
"You're a faf for leaving without me."
by definitelynotafaf May 10, 2020
Get the fafmug. 