you could have knocked me over with a feather

knock (someone) over with a feather

To shock, confuse, or astonish someone to a point of complete bewilderment; throw someone for a loop. More often phrased as "you could have knocked me over with a feather," expressing great bewilderment or surprise. It really knocked me over with a feather to hear that my ex-wife had already remarried. I was so taken aback when I found out I'd won the lottery that you could have knocked me over with a feather!
See also: feather, knock, over

you could have knocked me over with a feather

An expression of great or utter surprise, bewilderment, or astonishment. I was so taken aback when I found out I'd won the lottery that you could have knocked me over with a feather!
See also: could, feather, have, knock, over
Farlex Dictionary of Idioms.

You could have knocked me over with a feather.

Fig. I was extremely surprised.; I was so surprised that it was as if I was disoriented and could have been knocked over easily. When she told me she was going to get married, you could have knocked me over with a feather. John: Did you hear that they are going to tear down city hall and build a new oneprice tag twelve million dollars? Sally: Yes, and when I heard that, you could have knocked me over with a feather.
See also: could, feather, have, knock, over
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

You could have knocked me over with a feather

sent. I was completely surprised. I was shocked. You could have knocked me over with a feather.
See also: could, feather, have, knock, over
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • a stranger to (someone or something)
  • be out of (one's) league
  • be out of somebody's league
  • accompany (one) on a/(one's) journey
  • accompany on a journey
  • brief (someone) about (someone or something)
  • brief about
  • be (not) a patch on
  • be in bad with (someone)
  • (one) puts (one's) pants on one leg at a time