I see that some dictionaries do give this meaning, but it's new to me. I have heard 'toss ideas about', but 'knock an offer about' does not work for me.Doesn't the phrase "knock around/about" mean "to discuss something"? Knock around an idea.
I've heard it.
She came up with what sounded like a good idea. We knocked it around for a while but in the end, we dismissed it.
Hi
Do you also think that the word "offer" from my original sentence wouldn't work in this case?