GSF 

Group slut fic. Refers to a type of erotic fanfiction in which any and all members of a particular (usually all male) ensemble cast have crazy sex with each other. Probably originated in popslash fandom.

OMG, I just read the hottest GSF. All the members of *nsync were having hot mansex to the sweet strains of "This I Promise You!"

GSF by iguessnot September 5, 2008

GSF 

The Grove Street Families of Grand Theft Auto: San Andreas. Sweet, CJ's brother, is the leader of GSF, although CJ is the brains behind the organization.

oh yeah GSF for life!

GSF by Bob February 21, 2005

GSF 

It's not "Girls Suck Forever," it's Girls Shmirls Foundation. Get it right or pay the price.

I'm joining GSF, I've made up my mind. Forget this thing called love, it's a waste of time.

GSF by Joel November 17, 2004

GSF 

Gotta
Stay
Fly

Ey ma you know how it is. GSF.

GSF by GottaStayFly.er September 6, 2010

GSF 

Give a shit factor

Jim: "Can you get that report done?"
Bob: "Man, with it being so close to the holidays, my GSF is low. Can it wait till Monday?"

GSF by onesmartcookie38 December 30, 2011

GSF 

It is an acronym for Gorgeous, Stunning, Flawless. To be used as a positive expression.

The pictures from this magazine photoshoot are GSF!

GSF by aicetera September 8, 2010

GSF 

"Girls suck forever" a popular song by the band MXPX.

Man, screw love, I shall join GSF.

GSF by drozz August 19, 2003