隙に

while someone is distracted; when their guard is down

→ 隙
phrase Rare #45,666
while someone is distracted; when their guard is down Used for taking advantage of a moment when someone’s attention or vigilance has slackened.
JA: トムったら私が食卓から離れてる隙に、私のご飯つまみ食いしたのよ。
EN: Tom snuck a bite of my food while I was away from the table.

トムはメアリーがお風呂に入ってる隙に、彼女の日記をこっそり読んだんだよ。

While Mary was taking a bath, Tom secretly read her diary.

犯人とその仲間は目を離した隙に逃げ出した。

The culprit and his accomplices escaped the moment we took our eyes off them.