out of one's mind

idiom

Definition of out of one's mind

: not sane : crazy What a ridiculous idea! You must be out of your mind to believe that.

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“Out of one's mind.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/out%20of%20one%27s%20mind. Accessed 9 Aug. 2020.

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