A woman of loose morals who whilst being sexually promiscuous, possesses no aesthetic qualities of which the male species desires. I.e. shes fucking ugly.
Shes not a fucking pooskank!!!!! Bro, shes a fucking pooskank, honest she is bro!!!!
An immature way of referring to someone who is being a downer.
John, why don't you want to see "Hot Rod?" You're such a pooskank.