(n.) A crazy nymphomaniacal and usually sociopathic slut who craves the wang on a constant basis and does not let marriage or commitment get in the way. She is unstable and thinks she is better than everyone else, and will suck the life blood from her victims. See also, "succubus."
Insult. Implies the person deals in cocks and likes nothing better than cocks. Think fishmongerer, but insert the word "cock" in the place of the word "fish".
A female who appears to have the librarian-type look going for her, and appears to be a good girl, when in reality she is the biggest freak you have ever met in your life.