GSAF 

Acronym for 'Go suck a fuck', as immortalized by Donnie Darko's sister.

Quoting:
Donnie: You are such a fuckass.

Elizabeth: Did you just call me a fuckass? You can go suck a fuck.

Donnie: Oh, please, tell me Elizabeth, how exactly does one suck a fuck?

"You are totally messing this one up, aren't you? "GSAF already"

GSAF by Okki June 16, 2012

gsaf 

Abbreviation for 'go suck a fuck'. When used, it refers to the ever so endearing 'fuck off' or 'fuck you'. The line appears in the twisted movie Donnie Darko, released in 2001.

Donnie: You are such a fuckass.
Elizabeth: Did you just call me a fuckass? You can go suck a fuck.
Donnie: Oh, please, tell me Elizabeth, how exactly does one suck a fuck?

Maddy_Just_Fucked_U_Up: so i hear ur a whore :d
xterrorsexscenex: dude, gsaf

gsaf by rachaeleatsrazors February 17, 2010

gsafo 

go suck a fat one

meaning to go suck a fat dick

I told James to gsafo and he shut up.

gsafo by wayne smith June 24, 2008

GSAFD 

Acronym for "Go See A Fucking Doctor"

Guy: Dude, I think that I have Crabs
Guy 2: GSAFD man...

GSAFD by Gimnavi May 26, 2009