What Does "you must be out of your mind" Mean?
Learn what "you must be out of your mind" means, when people say it, and how to use it naturally in English.
You must be out of your mind.
It means the speaker thinks the other person is being unreasonable or insane.
From She Is Mine, Episode 38
When do people say this?
Scene Context
The speaker reacts in disbelief to something someone has said or done.
Usage Scenario
Use this in very heated arguments, but it is rude and insulting. It is not appropriate in polite conversation or at work.
Better ways to say it
Are you out of your mind?
You can't be serious.
That's insane.
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