odd or even
or odds or evens
noun
any of various games of chance in which one bets on an odd or even number, as one in which two players alternately draw from a pile of an odd number of counters any desired number up to a prearranged limit, the object being to have drawn an odd number of counters at the end of the game.
Also
odd and even.
Origin of odd or even
First recorded in 1625–35
Words nearby odd or even
odd,
odd couple,
odd fellow,
odd lot,
odd man out,
odd or even,
odd permutation,
odd trick,
odd-even check,
odd-job,
odd-jobman