上の空

distracted

→ 上
phrase Rare #44,701
distracted Describes someone whose mind is elsewhere and who is not paying attention.
JA: 心配事があって、授業中ずっと上の空だった。
EN: I had something on my mind, so I was distracted throughout class.

彼は上の空だ。

He's absent-minded.

上の空で、話を聞いてたでしょう。

You weren't really listening, were you?

明らかに上の空よね。

You're obviously distracted, aren't you?

上の空でした

It was empty upstairs.

— オッペンハイマー (2023)