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He has a long piston
piston by toxicvic February 9, 2019
Words you can keep
Double penetration sex, with one man fucking the girl in her vagina in and the other in the ass. They alternate thrusts to create a piston action, much like that of an engine.
"You take her in the ass, I'll take her in the pussy and we'll piston her"
Piston by Color Rot January 6, 2009
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!
Piston by The Pistonator September 3, 2014
you're a complete piston
piston by mandy April 2, 2004
Eww you like him he a piston.
piston by Jada I December 15, 2006
a long hard metal pole that i rammed in and out of an explosion chamber, used too create energgy annd poduces a loud sound
the pistons of an engine
piston by wastedcoworgasm February 20, 2024

Piston-hands 

Moniker for a jagged toothed female who coerces men into receiving unabashed, violent handjobs as a way of validating her morbid existence.
Look at Piston-hands talking to those guys; that hook nosed bitch is about to do something they will regret.
Piston-hands by urbanjerk July 14, 2010
More from Urban Dictionary

board chow 

A)
The Crud that collects under the keys in a keyboard. Usually more severe in the keyboards of programmers and webmasters as they tend to spend a lot of time at the the computer and thus eat at their desk. Mainly affecting IBM Model M (clicly) style boards.

B)
Can also be used to gross out Non-Techie people
A)
Bill: want to go to the club?
Bob: No, I've got to clean out my board chow, keys are starting to stick.

B)
Bill: Want to go out to get a bite?
Bob: No, i am just going to have some of my board chow/
Bill: Whats' that?
Bob: The food scraps that collect in my keyboard; Want some?
Bill: *GAG* *HURL* *GAG*
board chow by BinaryHackerMan September 3, 2007
Word of the Day on August 26, 2026
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