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. When something is fake as fuck.
by EseRomeo1 July 12, 2022
Get the Fafmug. 
FAF is an acronym for "Fake Ass Fan", and was originated from the Frank Caves community. Frank Caves called people Fake Ass Fans so much he decided to make an acronym for it.
by eLLyjeLLy69302320 February 8, 2024
Get the FAFmug. FAF
Some douchebag posts on social media and it’s clearly photographed. Fake As Fuck!
It might even be real, but fuck em’ hit em’ with a FAF Anyways.
In fact hit some prick up with a FAF just to piss them off even if you know it’s real.
“FAF LIFE”
Some douchebag posts on social media and it’s clearly photographed. Fake As Fuck!
It might even be real, but fuck em’ hit em’ with a FAF Anyways.
In fact hit some prick up with a FAF just to piss them off even if you know it’s real.
“FAF LIFE”
That’s FAF, ya shit cunt.
by Freyfear January 14, 2022
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.