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1.
having big titties; also can be used within the context of "breast implants."
My girlfriend was so flat, that her breasts look like two fried eggs on a wall. Shortly after her breast augmentation, she transformed into a hypermammiferous harlot!
by weave September 28, 2003
 
2.
Really big tits.
Tommy Lee introduced him self to Pamela by licking the Hypermammiferous star.
by fo-shizzle-mah-nizzle May 09, 2003