have a screw looseRate this phrase:(0.00 / 0 votes)Say it
A phrase meaning that the subject is insane or irrational.

I think old Mr. Jacobs has a screw loose; he keeps trying to feed his cats bird seed.

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"have a screw loose." Phrases.net. STANDS4 LLC, 2017. Web. 20 Nov. 2017. <http://www.phrases.net/phrase/have-a-screw-loose_4322>.

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