You could knock me over with a feather

Meaning

Used to express complete and total shock or disbelief. It implies that you are so weak from surprise that even the slightest nudge would topple you over.

Dramatic, surprised

Used in a sentence

• I cannot believe he actually quit his job to become a full-time llama farmer.
• When they told me I won the raffle I was so stunned you could knock me over with a feather.
• She said yes to the proposal after only two weeks so you could knock me over with a feather.