like a thief in the night

US /laɪk ə θiːf ɪn ðə naɪt/
UK /laɪk ə θiːf ɪn ðə naɪt/
"like a thief in the night" picture
1.

像夜賊一樣, 出其不意地

unexpectedly and without warning, often with negative connotations of stealth or sudden departure

:
He left like a thief in the night, owing everyone money.
像夜賊一樣離開了,欠了所有人的錢。
The storm arrived like a thief in the night, catching everyone off guard.
暴風雨像夜賊一樣突然來襲,讓所有人措手不及。