This is the gay version of a hoochie mama, commonly refered to as a "gold digger". They do anything that they can to get a man with lots of money to pay for their shit. Commonly , GHB's are also junkies, and most certainly have 3 different STD's at any given moment.
Passerby: Hey Cutie, you gotta nice ass, whats going on?
GHB-Billy: The Rent muthafuker, my goddamn rent.