A dupe, and tool for misinformation - misdirection for members of secret organizations - specifically the
Skull and Bones. Allegedly a mark would be given a symbol - icon - vis a numbskull as well as be taught a pre-arranged false version of secret codes, grips etc that would instantly identify them to any true member of the organization. In return they would clear a gambling debt, or secure a massive contract etc for the member.
Numbskulls would be selected from the socially ambitious, nouveau riche,
self-aggrandizing, or pompous: but smart and successful enough that a non member would believe they could be a true member. After being "initiated" they would continue to be used as a source of money, amusement, and insulation for real members and the true secrets of the organization. Compliance is reinforced with fear of a loss of personal pride, ego, or embarrassment of the mark, in the event of an unhappy, or unruly numbskull.