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6.
PSF
Pre-shit fart. A fart released shortly before taking a dump. Extraordinarily foul-smelling as a result of passing through a colon full of shit. Creates a warm or burning sensation in & around the anus when released.
"Dude, that PSF you just ripped was so nasty. Why don't you go to the bathroom and shit already?"
by synthbeatz May 18, 2010
7 34
 
1.
PSF
To PSF someone is to pull an awesome prank on them, usually in the form of hilarious teamkilling in online games.

Originated from the Steam clan The PSF, "Petrol Station Flowers", and their crazy antics.
Did you just kill Baz with his own exploding barrel?
Yeah, classic PSF.
by Robzor McFabulous March 02, 2011
47 12
 
2.
PSF
Post-shower flow
a person's hair right after he/she gets out of the shower
"That snapchat from him was sooo hot!"
"What as it?"
"He just got out of the shower! His PSF was amazing."
by maddieeeee December 29, 2013
6 0
 
3.
PSF
PSF is an acronym for "piece of shit faggot."

It is generally used when addressing a close friend as a term of endearment, in much the same fashion blacks stereotypically use racial slurs to express their friendship. Another similarity to the racial slurs parallel is that it is NOT acceptable to be outside a friendship circle and refer to someone within said circle as a "PSF."

The term "PSF" is often lengthened to its root "piece of shit faggot," depending upon the user and the situation at hand. When pressed for time or around someone not within the aforementioned circle, PSF becomes one's first choice. When not rushed and not bothered, the elongated term is the way to go.
Person 1: "What the fuck, man. That piece of shit faggot said he'd be here by now."

Person 2: "I know. Fuckin' PSF. Give him shit when he gets here."
by Golleniel October 21, 2013
6 2
 
4.
PSF
Acronym for Porn Star Finish. When a prostitute allows someone to cum on her face or body like a porn movie instead of cum inside her.
Most guys will do just about anything in exchange for an energetic, wet, sloppy blow job with a PSF.
by AndyRBR December 30, 2005
44 42
 
5.
(Acronym) N. - Professional Sneaker F***er - One who engages in the act of having sex with a sneaker. Usually male. The male usually rubs his penis on the outside of the shoe or inside the shoe until orgasm. Sometimes the participant simply masturbates and "comes" into or on the shoe itself. Very popular among exhibitionists.

This is usually a self-given title.
John Smith P.S.F.
by A. P. Finkelstein III January 08, 2009
3 3
 
7.
PSF
Acronym for Potential Swine Flu. This refers to catching Swine Flu by hooking up with a fat chick. The chick herself would be referred to as the PSF.
That chick is a PSF. Stay away unless you want to catch the Swine Flu
by Rhynon July 01, 2009
4 35