tossup

toss·up

T0284000 (tôs′ŭp′, tŏs′-)n. Informal 1. An even chance or choice: It is a tossup whether we will win or lose.2. The flipping of a coin to decide an issue.

toss•up

(ˈtɔsˌʌp, ˈtɒs-)

n. 1. the tossing of a coin to decide something by its fall. 2. an even choice or chance. [1740–50]

Thesaurus

Noun

1.

tossup - an unpredictable phenomenon; "it's a toss-up whether he will win or lose"even chance, toss-upfortune, hazard, luck, chance - an unknown and unpredictable phenomenon that causes an event to result one way rather than another; "bad luck caused his downfall"; "we ran into each other by pure chance"