お山やまの大たい将しょう

expression, noun

king of the hill; king of the castle

Refers to a children's game where one person stands on a mound or high place and tries to stay on top while others try to push them off. Also used figuratively for someone who acts like a big shot in a small group.

• 子こ供どもたちが公こう園えんでお山やまの大たい将しょうをして遊あそんでいる。

  The children are playing king of the hill in the park.

• 彼かれは小ちいさな部ぶ署しょでお山やまの大たい将しょうになっている。

  He acts like a big shot in his small department.