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1.
A blumpkin involving two men, where the person defecating (shitting) is also the one fellatiating (giving a blowjob)
John: Nice bathroom, isn't it?
Mark: Wanna Reverse Brother Blumpkin?
John: Reverse what?
Mark: You need to go on Urbandictionary.com, shut the fuck up and suck my dick.
by J-Sl1ce August 10, 2008