Pal hoe

Pal hoe (n) a person who is a semi-good friend and whom you also screw but no exclusively. Can be commonly replaced by side chick or friend with benefit

My friend Kelsey is such a pal hoe, it's great!

pisser pal

Someone you consistently have sex with. Could be friends with benefits, or your significant other.

I have been hanging out with Mary so much we decided to become pisser pals.