sharper

One that deals dishonestly with others, especially a cheating gambler.

A man shrewd in making bargains; a tricky fellow; a rascal; a cheat in bargaining or gaming.

A sharpener; an instrument or tool used for sharpening.

A long, thin oyster.

A person who bargains closely, especially, one who cheats in bargains; a swinder; also, a cheating gamester.

comparative form of sharp: more sharp

a swindler; a cheat; a professional gambler who makes his living by cheating.

a professional card player who makes a living by cheating at card games