fuck piston 

when two guys double team a girl one doggy style and one in the mouth. The man doing the doggy style thrusts so the girl goes forward and sucks the penis of the other man. The momentum is then pushed back, creating a piston like effect, using Newton's laws of motion.

I gave her the old fuck piston with my buddy.
We had to make sure she was lubed up good before we performed the ol' fuck piston.

fuck piston by Mijoe Bruedy March 1, 2008

Piston Fuck

Double penetration while alternating penetrations in a rhythmic fashion.

Me and my other guy friend piston fucked a nice young lady that we met at the ACL festival.

Piston Fuck by jnjlatx November 6, 2018

fuck pistol 

a cock that unloads like a gun

stick your fuck pistol in my cunt

fuck pistol by lee_dicko August 31, 2006

pistol fuck

To put make your hand in the shape of a pistol (Thumbs up, Index and middle finger out) and then finger a girl from behind (2 fingers in snatch and thumb in the butt). Almost always done from a doggy-style position. Usually accompanied by pulling hair for a more degrading experience.

Person 1: So man does she like it nasty or what?

Person 2: Hell yeah, I grabbed on and pistol fucked her for an hour.

pistol fuck by src5tt January 3, 2009

pistol fuck

most common in GOW. or Gears Of War, an FPS game on the xbox, often played on xbox live. when you "down" a person, you go up behind them. with a snub pistol. and repeadedly fire, but not at them. this appears as iff you are rapping them up the butt. and it also pisses the other person off which may end up in a serious chain saw to the head. use with caution.

player 1: dude! You JUst GOt PiSTOL FUCKED
player 2: Fucking noob! ill Kill you!

pistol fuck by im a crazy fool April 1, 2007