三みっ日か天てん下か

noun

short-lived rule; brief period in power; brief championship

A yojijukugo referring to a very short reign or period of dominance, often used metaphorically for any brief success or authority. The literal meaning is 'three-day reign', alluding to the historical figure Akechi Mitsuhide's short rule.

• 彼かれの社しゃ長ちょうとしての三みっ日か天てん下かはあっけなく終おわった。

  His brief reign as company president ended anticlimactically.

• 優ゆう勝しょうしたチームも三みっ日か天てん下かに終おわるかもしれない。

  The championship team might also end up being a brief champion.