Magnate, in the sense of
Morgan and Vanderbilt, who are very well known for controlling a vast majority of influence in their respective industries. Here, "chick magnate" refers to
one man's near-domination of the
female population in an average city-sized geographical area.
Girl you're
dating: "Hey, do you know Riff Bankston?
You: "Oh, that
chick magnate? What about him?"
GYD: "I think we should have a
threesome with him."