moccasin game
chiefly Canadian and historical
noun
A gambling game originating among North American Indians (especially in Canada), in which players attempt to guess the number of small objects hidden in a moccasin; (also) a game in which an object is hidden inside one of several moccasins, and players attempt to guess which one.
Origin
Mid 19th century; earliest use found in Charles Lanman (1819–1895).