Doxy

Doxy: A doxy is one of an uncountable number of terms for girlfriend, lover, prostitute, courtesan, slut, hussy, street walker, paramour, etc. As with many of these terms that probably evolved from street slang, the etymology is as obscure as the lives of those that invented those words in the depths of their wild imaginations - the same imaginations that let them survive and thrive outside the normal strictures of society.

I saw you slip your arm around that little doxy there - what is going on with you as if I didn't know.