A word for cock that i have now officially coined. Also just like the term flesh pipe and skin flute, except a little different.
Andy likes to have his ass tamped by a flesh piston
by Stormin70 August 23, 2010
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A double fisting that incorporates both anal and vaginal penetration. Fists are then pumped in and out in manner similar to that of pistons in a engine.
I gave that filthy sow the piston fisting of her life.
by josh1234 January 03, 2006
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Someone who gives the engine pistons a really hard time due to driving at excessive speeds.

Redlining Rev head, Speed freak, Motorhead
1. Typical piston bully, only knows one speed... flat out!

2. Hes a piston bully, always off the clock its wonder he hasnt lost his licence!

3. Only a Piston bully could redline a corvette
by magpiez July 02, 2012
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A brutal fucking either Anal or regular.
Guy A: dude remember that girl from the bar

Guy B: yea

Guy A: I took her home last night and gave her a piston undo, she couldn't even get out of my bed this morning and kept complaining about how sore she was.
by Sourcherios December 27, 2009
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When a male wears a strap-on backwards and proceeds to have sex with two women at the same time. One in front and one behind
Bro, my ex called me last night and wanted to have a three-way with her best friend. Needless to say, I brought out the twin piston
by sthrock4 May 04, 2017
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To be "Piston Broke" is to be both pissed and broke. Most commonly heard amongst mechanics/bikers after being asked how they are.
Biker 1: "How are ya buddy?"
Biker 2: "Piston broke"
by mikeyboy9799 February 28, 2011
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