Shitsterbation 

Act of shitting in your hand and beating your dick with your shit

Jack took a massive shit and used his shit to shitsterbation

Shitsterbation by Pussytoass June 20, 2021

Shitsturbation 

A simultaneous performance of shitting and masturbating, often done in public restrooms.

Kayla: Wow, I heard some really weird noises when I was using the restroom. Sounded like someone was really enjoying their dump...
Michael: They were probably undergoing Shitsturbation. It's like a self-performed blumpkin with your hands.

Shitsturbation by gofgirl983 December 17, 2011

Shatsturbation 

When you masturbate while shitting, so both explode at the same time.

After last nights shatsturbation, I thought I could die happy. It was pure bliss.

Shatsturbation by prosperoust February 4, 2009

Shittersation 

A conversation held by two or more people who are on the toilet

So i was on the can when this guy in the stall next to me kept trying to start a shittersation with me

Shittersation by the daily hoogleflogger November 10, 2010

shitterbating 

masterbating whilst taking a shit.

Wow, Mr. Tamositis has been in there a while, I bet he's shitterbating again . . .

shitterbating by henrydinhofer October 18, 2010

Shitsturbating 

When you're jerking off on the toilet before a shower but flush it before you get in the shower so your family thinks you were shitting

Yesterday I was shitsturbating but I forgot to flush... Now my family totally knows I was wacking it.

Shitsturbating by Shitsturbator69 December 10, 2018

Shitterbation sign

A sign used in prison/jail settings to alert others you are doin’ ur business....can serve dual purpose, hopefully at separate times.

Offender Smith had to drop a deuce so he put his shitterbation sign up so his celly would know to steer clear for a bit.

Shitterbation sign by H to the Izzo July 8, 2019