庸よう君くん

noun

stupid ruler; incompetent monarch

A literary or historical term for a foolish or inept sovereign. Not used in everyday conversation; appears in discussions of history, politics, or classical texts.

• 歴れき史し書しょには、国くにを滅ほろぼした庸よう君くんの例れいがいくつも記しるされている。

  History books record many examples of stupid rulers who ruined their countries.