odd or even

noun

variants or odd and even or odds or evens

: one of several games of chance or skill in which there is guessing or betting as to whether a certain number will be odd or even: such as

a

: a game in which one player selects and holds an odd or even number of counters (as beans) and the other guesses which it is

b

: a game of betting on casts of dice or turns of a wheel

c

: a simplified form of fan-tan (see fan-tan sense 1)

d

: a mathematical game similar to nim in which the object is to take or leave an odd number of counters

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