人ひともあろうに

expression

of all people

Used to express surprise, disappointment, or irony that a particular person (often someone trusted or expected to behave better) did something. Typically followed by a negative or unexpected action.

• 人ひともあろうに、彼かれがそんな嘘うそをつくとは思おもわなかった。

  Of all people, I never thought he would tell such a lie.

• 人ひともあろうに、先せん生せいが遅ち刻こくするなんて。

  Of all people, the teacher being late!