A prostitute.
A charlatan, huckster, grifter, swindler, a scoundrel.
A pimp.
Somebody who pretends to be an amateur at a game in order to win bets.
A male prostitute who sells his services to men.
One who rushes or hurries; an energetic person.
A mistress; a woman one dates in addition to one's girlfriend or wife, usually in secret.