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Rusty Engine 

The sexual act of stuffing an extra large pepperoni pizza into the anal canal and having ones lover or partner eat it out of his or her behind.
Yeah, she wanted me to give her a Rusty Engine but i wasn't that hungry
Rusty Engine by coolguy199 December 14, 2010

rusty steam engine 

When a woman farts on the inward thrust during anal sex.
The rusty steam engine blew me out and then back in, out and then back in.
rusty steam engine by Sensual Fuckery September 30, 2017