reverse oil rig 

to try and perform anal sex while you partner is trying to take a shit.

george did the reverse oil rig on hartman.

reverse oil rig by george luhovey August 13, 2007

reverse oilrigger

In the oil rich province of Alberta, Canada, this is a sexual position, where the man is standing over the woman, who is in the roasted chicken position, with his back to her he then crouches down and pushes his hard-on (vertically) straight down into her snatch.

That dude gave her the reverse oilrigger in the roasted chicken position.

reverse oilrigger by R Milford January 5, 2009