MARK • Noun
A sucker or intended victim. Originated from the chalk mark carnival grifters placed on the back shoulder of a potential easy victim or someone known to be carrying a lot of cash.

MECHANIC • Noun
Someone who specializes in sleight-of-hand card manipulation.

MICHIGAN ROLL • Noun
A phony money roll, usually with a high denomination bill wrapped around blank paper.

MONEY LAUNDERING • Noun
A process by which illegal income is made to appear to come from a legitimate source.

MONKEY FISHING • Noun
A hoax or fake story. "Don't listen to him, he's taking you monkey fishing."

MORELLIAN ANALYSIS • Noun
A method of discerning genuine artwork from forgeries, involving the study of the formulas artists develop in the creation of their work through idiosyncrasy and repeated stylistic detail.