One who is so slutty that they are filled so full of cock that they become the size of a hippopotamus. Can apply to both male and female and is only to be used on the sluttiest of people.
Ashley is such a slut, she slept with the whole damn school, what a cockopotamus.
by Stonedasfuck159 December 04, 2009
A cockopotamus was the result of a science experiment gone wrong in 1776. The experiment created a new species called the "cockopotamus" which is a mix breed between a penis and a hippopotamus resulting in the shape, size, and color of a human penis, with the size of an entire hippopotamus.
That slut, Jake L*bella just got fucked by a cockopotamus!
by BigBlackPenisGuy October 05, 2011