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1.
The Ultimate Blumpkin is to receive fellatio whilst depositing feces in the lavatory, AND reading the Sports Page. Thus creating the ultimate male experience.
"I just received an Ultimate Blumpkin. By the way, did you hear about the "big trade involving your hometown team"?"
by Blumpking777 December 12, 2006
 
2.
To get a bj while taking a dump and eating lobster at the same time.
I went over to legal seafood and got an ultimate blumpkin in the bathroom.
by spoonman14 June 10, 2009