A WISE GUY is a winning professional gambler who's reputation is so big that he has the ability to influence the betting market. Wise Guys often play games with the sportsbooks mixing decoy bets with real bets; this often gets the Wise Guy a better price on the substantial bet.   Billy Walters is considered the Godfather of all Wise Guys; every professional gambler has a story or a tale about Mr. Walters.