piston pump

Slang referring to an aggressive, furious, rapid act of fellatio. The piston pump receives its name from the rapid head movement exhibited by the provider of the fellatio, which is said to resemble the action of a moving piston. This is also referred to as the jackhammer. The piston pump is much sought after in the world of fellatio and should be received with grace and humility.

Man, that piston pump was great. I have never been sucked off so furiously.

by Boozy Barfly November 11, 2008

german piston

the femal version of a dutch ruuder

"gosh, joe gave me a great german piston last night"

by lars fredricksen January 9, 2009

Urban Pioneer

Someone who buys a run-down house in an older sometimes depressed neighborhood of a city, remodels it, then sells it for a profit and moves on to another house.

An urban pioneer just purchased that old mansion on 3rd street.

by aenimafist August 29, 2010

Pisano

Loyalty, Honor and Defiance. Always FULL BLOODED ITALIAN!

Tommy went all PISANO on John's ass.

by Dominique Pisano September 28, 2008

split pissonality

When you're taking a leak and you get two streams out of the one hole!

HAHAHAHAHAHA!! What a clever and funny definition!!

by Da Man July 16, 2004

pion

someone you can piss on a.k.a. there under you

a.k.a. there under you, someone that's not on your level
a you pion, get the fuck out of here.

by Lance Auer June 20, 2006

Piston

A Sexual act similar to cave diving. The male not only sticks his head in the woman's vagina, but proceeds to climb entirely inside of her. Once inside of her he sticks his penis out of her vagina. Using his penis the girl goes and engages in intercourse with someone else. (The only downfall to this act is that a cesarean section will need to be performed in order for the guy to come out.)

Friend 1: Did you hear about Jessica?

Friend 2:No what happened?

Friend1: Her and Jack did the piston!

by The Pistonator September 3, 2014