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The sexual act in which, after a thorough reaming of a ladies ass, you flip her upside down and poop into her gaping butt cavity.
Last night I gave that skank whore the old Mongolian Chimney sweep and got crap all over the hotel.
by El Kroppo July 17, 2008
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A sexual act performed following anal intercourse, where the person who was being penetrated does a head-stand exposing his/her gaping anus and the penetrator sits atop the penetratee and defecates into their rectum.
The Mongolian Chimneysweep requires some degree of flexibility.
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