Top Definition
An enormous black and white tuxedo lady-kitty that sits around and barfs all day.

She would look great in a tutu.

If you scream "Pookiepotamus" to her, she screams at you, then promptly runs. This is her way of saying, "chase me".
Yuck, I just stepped in Pookiepotamus barf.

It's good luck if you see a Pookiepotamus cross your path. Pookiepotamus, in Greek, means "rotund goddess with pink nipples"
by TRINA April 16, 2013
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