三日天下

Etymology
From 🇰🇲. in the reading.

Originally referred to the short-lived regime of during the :    soon after he killed  and took his position of   during the, he was chased and defeated by , before he was finally killed by local bandits. figuratively represents a short time; Mitsuhide's regime actually lasted eleven days.

Noun

 * 1) a short-lived regime
 * 2) being in power over a very short time