コイントス

noun

coin toss; coin flip

Refers to the act of flipping a coin to decide something, or the result of that flip. Used in both literal and figurative contexts.

• 試し合あいの前まえにコイントスで先せん攻こうを決きめた。

  We decided who goes first by a coin toss before the match.

• どちらにするか迷まよったので、コイントスで決きめよう。

  I couldn't decide which one, so let's settle it with a coin toss.