On the rare occasion that a person is born with both a vagina (poon) and a penis, they have poonis.

An alien penis

a peice of poo that resembles a penis.

A cross between a Poo and a Penis.
A penis made totally out of poo.

plural for pooni

a poonis is the butt because poo comes out of it like pee comes out of the wiener.

combination of penis and poon;

1)can be used in reference to a dike, tranny, homo, etc.

2)can be used to express how ugly a person is.

3)when your swimsuit is old and ratty and it sags at the crotch, it looks like a poonis.