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2.
Beating-off while laying a duker.
What'd you get up to last night?

Not much. I drank a box of wine and then stayed up masterpooing after my girlfriend went to sleep. You?

Same thing.
by Skrunk-D October 04, 2005
 
1.
-The lost art of simultaneously pounding out one's own ejaculate and feces into the same receptacle.

-The time-biding act of gratifying oneself while defecation occurs.
After Chauncey saw the sexy broad on his way to the bathroom, he knew the Sun-Times was not necessary as a master-poo was now in order.
by ShadesI January 26, 2011
 
3.
The act of beating off while laying a Cleveland steamer.
I'd rather be masterpooing!
by d-rox September 14, 2005
 
4.
-The lost art of simultaneously pounding out one's own ejaculate and feces into the same receptacle.

-The time-biding act of gratifying oneself while defecation occurs.
After Chauncey saw the sexy broad on his way to the bathroom, he knew the Sun-Times was not necessary as a master-poo was now in order.
by ShadesI January 26, 2011