A sex act involving three men. The first man stands in front while he is penetrated by the second man, and the second man is penetrated by the third man. The second man thrusts between the other two men, thus creating a piston motion.
Bill: Last night, I went home with these two hot guys, and I got between them and we did the rusty piston.
Jeff: Awesome! Wish I could have been there.
Jeff: Awesome! Wish I could have been there.
by luciferi666 May 11, 2014
by Easyrider75 September 30, 2015
Jenny had been thinking about tossing Paulies salad all day...she wanted the musk, the sweat, the dirt and everything in between. Pauly knew this so not only did he keep his butt unclean but he barely wiped it after a number two so she could have the full rusty cave experience.
by Seaguller12 January 15, 2015
When a male lays on his back with his diseased penis erect (like and antenna) and gets fucked cowgirl style by a girl, generally a random, drunken slut.
by gingerspice1398 July 26, 2011
The act of receiving fellatio on a public bathroom while your anal sphincter is in close contact with the rusty drain that's totally in every bathroom.
by Alex Butthole November 25, 2013
Rusty Pancoast will back you up, even if your a chick facing five or six big guys and it's just the two of you :)
by BurBur--:) December 01, 2009
When a male takes a shit during while hitting it doggy style. Then after cumming stands up and forces his partner to sit in it.
by MR Hagy March 22, 2011