What is "cardshark"

Usage examples of "cardshark".

She must resemble a character in one of those movie scenes where the deceived cowboy cottons to the truth and overturns the poker table on the dishonest itinerant cardshark, except that she was playing the drama in slow motion, as in a Western underwater.

But because their hair was hidden under dark hats and their faces were obscured behind stockings and bandannas, and also because each robber was obviously putting on an act and an accent with his voice (not to mention the fact that the cardsharks, from Bruno Martinez through to Bud Gleason,- were shitting ice cubes), it was difficult to say just which local personalities were responsible for this outrage.