(derogatory) A man who uses the services of prostitutes.
A pimp.
(figurative) An exploiter of people.
a. 2000, Dale Brown, quoted in Commercialism and Conflict in Big-Time College Sports by Andrew Zimbalist
This one-billion-dollar TV contract is the paramount example of the injustices in the game. Look at the money we make off predominately poor black kids. We're the whoremasters.