Also: A person who cock-blocks or pussy-blocks a friend trying to score a piece of ass. This tends to be the drunk or clueless person of the group and their actions are theoretically kicking thier friend in the crotch.
She's a Crotch Cracker, don't hit that.
Doug is gonna be a Crotch Cracker again tonight and I will go home alone.
That fucking Crotch Cracker pisses me off!