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1.
Noun; Used to describe an extremely large butt.

Hip-po-pot-um-ass

One who was blessed or cursed with a rotund rear, that resembles the girth of the posterior of the amphibious creature hippopotamus.
"Hello sir, are you aware your wife was blessed with a hippopotomass?"

"Yes, I married her for that reason alone, a large fine bootious-maximus is highly desirable. Thank you for your observation."

"Good day."
by MixMastaK October 30, 2009