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Very simple definition .... dirtpiece is another word for asshole, rectum, shitbox, chocolate starfish or whatever the hell else you wanna call it.
She thought she was out for a romantic evening, a candle-lit dinner at a fancy restaurant, some sensual dancing, then home for a night of tender lovemaking.

Instead I took her ass to Mickey D's, dropped some body-popping, then went balls deep up in dat biyatches dirtpiece! Chuch!
by Silky Johnson April 04, 2005