be missing some of (one's) buttons

be missing some of (one's) buttons

To be mentally deficient, incompetent, or deranged; to be of unsound mind. My poor grandmother is missing some of her buttons after her stroke. I've been so sleep deprived lately that it feels like I'm missing some of my buttons! You can't tell people you want to start a business selling bees as pets—they'll think you're missing some of your buttons!
See also: button, missing, of
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