Slang. a person who employs fraudulent or unscrupulous methods to obtain money; swindler.

Informal. an expert gambler or game player who seeks out challengers, especially unsuspecting amateur ones, in order to win money from them:
He earned his living as a pool hustler.

Do you doubt my ability to make even the best card player poor as dirt? Why don't we have a game of cribbage and i'll show you.