Slipjack

A prison term for placing ones weiner between another males lubed butt cheeks, squeezing them together like boobs amd proceeding to hump vigorously. Also know as the bro slide if you're not incarcerated

Ron
Man this prison shit is for the birds. I almost wish I was gay.

Phil
I have a way we can do it and not be gay. It's called the slipjack. You want to give it a shot?

Ron
Hell yes! I've been wanting to slipjack them cheeks for a year already! Let's get it on!