Can we use "Do your Button" for "Close your button"?
In an English movie, I saw one lady tell another
Your button is undone!
meaning Your button is unbuttoned.
So can we say "Do your button" to mean Button your button?
EDIT: For the reference, this dialogue is taken from the movie "Unfaithful". Script and the context can be seen here.
Solution 1:
This is completely understandable to me as well, if not idiomatic.
I would add that a construction you are more likely to hear and use than
"X your button" (where X signifies: do, fasten, button, button up, fix)
is
"button your Y" (where Y signifies: shirt, pants, jacket, lip)
Solution 2:
In my experience, the common expression would be do up your button. You might also hear button up if button is used as a verb. I don't think you would hear native speakers say "open your button" or "close your button".
Solution 3:
Button your button is an unlikely thing for a speaker of British English to say. We’d say Do your button up.
Button itself is a verb as well as noun, but when used as such it, too, also often occurs with up.
Solution 4:
"Do" in this case is simply a vague verb meaning "fix what's wrong with" your button. People talk like this all the time, especially us working class heroes. If your fly were open (either unzipped or unbuttoned), then someone who uses that type of expression would say "Do your fly" or "Do your zipper". It may not be a standard idiom, but it's perfectly understandable, and I wouldn't bat an eye were I to hear it.
I don't see why you can't use it when speaking to someone.