Another meaning for a street hustler, male, who generally works his trade at night. Additionally it implies homosexual sex only, not where one seeks women, but actively seeks other males, for sex, for money.
Midnight Cowboy was also a movie of that title, that dealt with a man who turned to male prostitution, to support himself in New York.
Starred Dustin Hoffman and Jon Voight.
Won Best Picture in 1969.
The term does not always imply that the male seeking other males for sex, is gay.
Can refer to either a straight male, or homosexual male.