Piston Fisting

The art of shoving one whole fist in a girl's arse and the other in her vagina and ramming them in and out alternately (like a piston system)

I was piston fisting her til she blead

by Tha BIG Daddy H July 26, 2009

piston head

(n.) One who is very interested in the mechanics of vehicles, particularly luxury or sports cars. Similar to a gear head

The only thing more boring than a piston head is a gear head

by Gumba Gumba May 23, 2004

Dread Piston

1) Name of an African American male genitalia area when the pubic hair is long enough to make into dreads.

Bro, you need to shave that carpet 'round your dread piston.

by Laydown89 November 23, 2014

Rusty Piston

A sex act involving three men. The first man stands in front while he is penetrated by the second man, and the second man is penetrated by the third man. The second man thrusts between the other two men, thus creating a piston motion.

Bill: Last night, I went home with these two hot guys, and I got between them and we did the rusty piston.
Jeff: Awesome! Wish I could have been there.

by luciferi666 May 11, 2014

detroit pistons

The worst team in the NBA, most overrated team. Everybody thinks they are so good because they have Ben Wallace, etc. They got thrashed by the San Antonio Spurs in the 2005 Finals and they deserved it.

DETROIT PISTONS SUCK!!!!!!!!!!!!!!!! OVERRATED!!! OVERRATED!!!! OVERRATED!!!!!!

,,|,, *_* ,,|,, (flipping off the detroit pistons)

by Piston hater May 11, 2006

Jiz Piston

Penis.

My girlfriend was feeling horny so I stuck her with my jiz piston.

by Nickelman returns August 17, 2011

Piston Portico

Asshole - butthole - anus - the place where fleshy pistons can be pushed into!

She took all 10" in the piston portico

by MudWhistle January 26, 2004