tossup

[taws-uhp, tos-]

noun

the tossing of a coin to decide something by its fall.
an even choice or chance: It's a tossup whether they'll come or not.

Origin of tossup

First recorded in 1740–50; noun use of verb phrase toss up
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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