not know what hit you
成語所屬單字hit
not know what hit you — 慣用語
1. To be so surprised by something that you do not know how to react.
1.慣用語
釋義
不知所措
To be so surprised by something that you do not know how to react.
例句
When the offer came, he didn't know what hit him.
She was so shocked by the news that she didn't know what hit her.