a hippocornamus is a cross between a hippopotamus and a unicorn. They are most commenly drawn black and white, but in rare cases they can be rainbow. Also, sometimes they can fly.
by me48liz November 26, 2009
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Girl 2: Didn't you hook up with some guy you'd known for 2 hours last weekend? You're a hippocrotamus.
Girl 2: Didn't you hook up with some guy you'd known for 2 hours last weekend? You're a hippocrotamus.
by Girl Interrupted August 30, 2010
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An enormous hypocrite. Someone that has reached such extreme levels of hypocrisy that it is all prevailing, dangerous and out of control, like a rampaging hippopotamus.
by Harrisimo December 22, 2019
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