Shatterbate 

(v) The Act of Masturbating while taking a shit

"Shit, I really had to pinch one out when I was at Six Flags. I just decided to shatterbate in the bathroom"

Shatterbate by Shrek'sBrotherinlaw November 19, 2014

shasturbate 

The act of masturbating while defecating.

I was in such a rush this morning that I was forced to shasturbate,.

shasturbate by vink pink February 10, 2005

shasterbate 

shitting while masterbating

person number 1: "oh wow Justin the football player, takes a long time in the bathroom"
person number 2: "hes probably masturbating while he shits"
person number 1: "haha, Justin shasterbates"
person number 2: "hahahaha thats clever. shasterbate!"

shasterbate by shexcelent December 1, 2009

Scatterbating 

Making vocal jazz improvisation whilst pleasuring ones self.

"Be-bi-bibitty bop de-boop"...splooge.

I just walked in on Cats Polino Scatterbating in the speakeasy bathroom.

Scatterbating by Cats Polino December 19, 2013

shaturbate 

To shit and masturbate at the same time

I was sitting on the toilet, and I decided to shaturbate to this picture of Jenny

shaturbate by Poloshirts64 May 7, 2014

Shiterbate 

To go to the restroom, informing everyone you intend to take a shit, and remain in the restroom for an extended period of time while actually masterbating

Scott: Where is Kevin?
Andy: Oh he is in the bathroom, has been for 20 minutes, said he was taking a shit.
Scott: Oh, he must be going to shiterbate.

Shiterbate by Nazgul4591 November 1, 2009

shitsterbate 

to masturbate on the toilet while taking a shit

there are some good porn mags in the bathroom I couldn't resist getting my shitsterbate on just now.

shitsterbate by james___ March 20, 2008