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1.
when a girls privates have been stained brown from failing to wipe properly ( from front to back not back to front )

"the pictures taken in the motel of her privates showed obvious signs of a dirty brown pie"
by im#1SuperStar July 19, 2009
 
2.
Noun
1. A big ass piece of human shit, fresh from the oven (asshole) and good enough to eat.
Billy: Mommy, what's for lunch?

Mommy: Hang on darling, mommy just has to scoop up a little of this brown pie off your father's chest, then we can eat at the table like a family does.
by john tinkleberry VIII January 13, 2007