What is the meaning of this figure speech knocked me over with a feather.?

"Knocked me over with a feather" is an idiom that means to be utterly surprised or astonished. It implies that something so unexpected or unbelievable happened that it left you speechless and shocked, almost as if a light feather could have physically knocked you over.

Here's why it's a figure of speech:

* Hyperbole: The phrase is an exaggeration. A feather is far too light to knock someone over.

* Metaphor: It uses the image of being knocked over to represent the feeling of shock and surprise.

Example:

* "When I found out I won the lottery, it knocked me over with a feather!"

Let me know if you'd like to see more examples or have other questions about figures of speech!