Steamy Jack 

The act of masterbating while in the act of pooping.

"Last night i was horny, but i had to poop so i decided to do a Steamy Jack"

Steamy Jack by Brandon Dun. August 4, 2007

Steady Jacking 

Masturbating in an uninterupted manner, regardless of the situation.

Did you see Fred? That bastard was Steady Jacking on the front porch at Kim's party!

Steady Jacking by Capt. Load Chucker February 29, 2008

Steady Jacker 

One that partakes in Steady Jacking

What the fuck is Bob doin over there?
Steady Jacking, he's always been a Steady Jacker.

Steady Jacker by Capt. Load Chucker March 1, 2008

Steam jackhammer

The sexual act of defecating on a subjects chest, followed by rapidly inserting a penis into the feces pile.

I gave her the steam jackhammer, she was ok with it until I finished her off with a dirty Sanchez.

Steam jackhammer by Sexual seductor February 12, 2013