Top Definition
when a person takes a steamy shite on another persons stomach, then they proceed in moving the tird around by flexing their stomach muscles
I gave ms wilmshurst the best!, brown tumbler last night
by demitri March 11, 2005
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When one takes a dump in one's dryer and turns it on turning it into the brown tumbler.
It's in the same category as a Upper Decker.
At a party go into the laundry room take a dump in the dryer, preferably a top load, and proceed to turn it on and do the Brown Tumbler.
by Myra Meins December 12, 2010
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