A fork of Rural Dictionary
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!"
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.
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?"