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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!"
by iguessnot July 02, 2006
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Jul 26 Word of the Day
Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term β€œsecond string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A β€œSecond String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed
I got a call from X the other night. She had an extra ticket to a concert she bought for a friend, but they couldn’t make it so she called me to ask if I wanted to go because I am her Second String Friend.
by Deus-ex-machina August 26, 2020
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2
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.
by Bob February 21, 2005
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3
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.
by Joel November 17, 2004
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5
Gangus Strike Force

G.S.F serves and protects the community agains gangus people. If a gangus person is spotted in a public place, G.S.F is informed, and they remove the person from the area by any means Necessary.
person 1: ew look at that gangus bitch
person 2: call G.S.F before its to late
by El-raaa August 04, 2007
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