look up any word, like tribbing:
 
9.
Fast is used as an adjective meaning 'close', 'strong', 'loyal', 'permanent'.
Fast colors meaning resistant to fading. Fast friends meaning loyal friends, close friends, permanent friends.

John and I have been fast friends since we met in the 4th grade.
by Mustang Ed October 01, 2011
 
1.
A girl or guy who is quick to engage in sexual activities.
Damn that slut was fast.
by SpeedDemon February 28, 2005
 
2.
When you stop eating for a period of time, only water.
It's a method to lose weight, used by anorexic people.
I am going to fast for a week, hope it pays off this time...
by Anneke November 06, 2004
 
3.
being a nasty whore and sleeping around
Damn, Quesia sure is one fast ass hoe.
by Anonymous February 26, 2003
 
4.
an adolescent girl who acts much older than she is by dressing like a skank, dancing like a hoochie, or just being a general ho.
Oh, look at that fast girl all on that man like she ain't 13.
by aahzkerh July 18, 2005
 
5.
1. Having a high rate of speed
2. braedennial or brenden
I drive a fast car. Roller coasters go fast.
by Always In last place September 17, 2004
 
6.
easy to get(girl)..giving their goodies up quick,if you know what i mean.
Jason:Hey Mark! you heard about megan?
Mark:Yea,Shes fast!I can imagine how many boys she dated.
Jason:She probably went out with everyone in the school
Mark:She goes out with anyone.
by CrAziibree May 12, 2009
 
7.
Fucking ask someone twat!

Origin: Hat Films

popular acronym with the three chaps.
Geoff: Hey guys, you know where I can get some booze?
Derell: F.A.S.T. nigga.
Geoff: What?
Derell: Fucking ask someone twat!
by Anonymous Haater October 08, 2013