dumpurbate 

verb: to release one's bowels while simultaneously releasing one's semen. AKA: jizzing while ya shizzing.

I dumpurbate.
You dumpurbate.
He-she-it dumpurbates.

dumpurbate by SockCucker April 20, 2014

dumperbate 

to defecate and then masturbate into a toilet bowl.

Worked sucked today until I dumperbated then I felt like roses.

dumperbate by jaywix May 17, 2009

Dumpsturbate 

The act of shitting on a pillow and then enclosing your member in the pillow and thrusting wildly.

Geoff: "I had a cracking dumpsturbate last night."
Steve: "Sum the experience up in less than three words."
Geoff: "Spunky shitty disappointment."

Dumpsturbate by Wankyshitdemon March 2, 2014

Dumpulate

When you have a huge anus stretching dump that feels so good it makes you ejaculate.

Sorry I took so long, I dumpulated everywhere!

Dumpulate by CaptainLoaf July 27, 2016