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.
by Stonedasfuck159 December 5, 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.
by BigBlackPenisGuy October 5, 2011