Masturpoop 

When you jizz and shit at the same time, and travel through time because of it.

I masturpooped and then went back to the 1400s. French. EVERYWHERE.

Masturpoop by Anonim2 July 25, 2010

MasturProcrastination 

The act of masturbating when you have run out of things to do while procrastinating.

I decided masturprocrastination would be more fun that reading Shakespeare.

MasturProcrastination by Awesome_MF April 20, 2011

masterbooping 

When you take a dump and jerk off at the same time.

"damn, that brey chick is hot. But i gotta take a shit. I'm gonna go masteboop.

"mark's mom caught him masterbooping. He was covered in feces and semen."

masterbooping by cuminmybutt January 12, 2008

masterooping 

masturbating while you take a poop.

one day i was sitting on the toilet masterooping.

masterooping by chief121692 November 18, 2010

MasturProcrasturbation 

Procrastination by the mean so Masturbation.

Guy#1 You really should stop with that MasturProcrasturbation it's not good for you
Guy#2 But it feels so good!

Mum: =O WHAT ARE YOU DOING?!
Son: MasturProcrasturbation, now get out... This is awkward!

MasturProcrasturbation by Steveeeeeh April 5, 2011

masturposting 

The act of posting a message on a forum that is so undoubtedly awesome, that you climax numerous times while writing it.

John was so into his carefully worded tyraid against hotgrrl6969, who inadvertantly posted a thread on the wrong section of the message board, that he unintentionally masturposted all over his keyboard.

masturposting by Geoff B January 21, 2004

Masturbooping 

Jerking while pooping on the toilet.

man i was so bored sitting on the toilet, so i started masturbooping

Masturbooping by ZomgPoof December 12, 2011