Definition of Flim flam
A form of bunco or confidence game. Commonwealth v. Townsend, 149 Pa.Super. 337, 27 A.2d 462, 463. Procedure variously known as "flim-flam”, "faith and trust” or "confidence game” essentially is performed by two operators, ostensibly strangers to each other, by persuading victim to turn over to one of operators a sum of money to demonstrate his trustworthiness as prerequisite to obtaining some easy money and, after victim has turned over his money, operators disappear and victim receives nothing. Few v. U. S., D.C.App., 248 A.2d 125.
That's the definition of Flim flam in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.