you could have knocked me, etc. down with a feather

you could have knocked me down 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 down with a feather!See also: could, down, feather, have, knock

you could have knocked me, etc. down with a ˈfeather

(informal) used to tell somebody about a very surprising experience: When they said how much the painting was worth, you could have knocked me down with a feather!See also: could, down, feather, have, knock