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 prostitute.
A deliberate scoundrel.
A vile, wicked person.
An extremely depraved person, or one capable or guilty of great crimes.
Any opponent player, especially a hypothetical player for example and didactic purposes. Compare: hero (“the current player”).
In fiction, a character who has the role of being bad, especially antagonizing the hero.