1.) A punk-ass coward with little or no backbone. He feels he has to lie in order to fit in with the real men. Usually afraid of anything challenging. 2.) A general name to refer to a dude you don't know. As in, "All right, buster, this time you're going down for the count." or "Look here buster, I didn't sign up for this shit!" 3.) A faux gang member.
Portrait- 1912 Penelope and the Suitor by, John William Waterhouse
It's his job to present himself in a positive, prosperous-made-of-money kind of way to win her or him over. Prospecting a potential mate.