Definitions by Robzor McFabulous

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.

PSF by Robzor McFabulous March 17, 2011