Confidence game

any swindle in which the swindler, after gaining the confidence of the victim, robs the victim by cheating at a gambling game, appropriating funds entrusted for investment, or the like.

noun

bait-and-switch , boiler room , bunco game , bunko , con , confidence trick , con game , flimflam , hustle , ponzi , racket , rip-off , shell game , skin game , sting , swindle