Whistle dick

A young adult male prostitute who loiters with others in a park or on a particular corner who is summoned to a customer's car by the customer whistling. Synonym of hustler.

Since others in the area may be selling drugs or pimping female prostitutes or might be undercover law enforcement officers, this word is used by peers and others to indicate which business the person is doing in the area: “What is he doing here?” “Oh, he is just a whistle dick.” (Not a cop, drug dealer, or pimp.)