you could have knocked me down with a feather

成語所屬單字feather

you could have knocked me down with a feather — 慣用語

1. Used to show that you were extremely surprised by something.

1.慣用語
釋義

讓我大吃一驚

Used to show that you were extremely surprised by something.

例句

When Aiden won the lottery, you could have knocked me down with a feather.

You could have knocked me down with a feather when I saw the final score.