Piston

What is Piston?

1.

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"

See sex, double penetration, vaginal, anal, vagina

2.

somebody who is sh** ugly

Eww you like him he a piston.

See ugly

3.

someone who is an idiot

you're a complete piston

See mandy

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