screw loose

But this time I can plainly hear, through the rush of words, the faint rattle of hysteria that bespeaks a screw loose somewhere.

“I have always thought Libertarians have a screw loose, anyway,” Dean added.

Shelton portrays McCain as unhinged and unreasonable—a ranting bully with “a screw loose.”

Had there not been something crooked about Lizzie,—a screw loose, as people say,—she would never have been within his reach.

I think I have a good feeling for such things; but ‘non omnia possumus, etc.;’ some Screw loose.

To Bruce it was indicative of a man with a moral screw loose, it denoted a laxity of principle.

Theres a screw loose somewhere, said Billie calmly, jumping out and looking critically at the outer workings of the car.

Those who saw much of him were convinced that, as they termed it, "there was a screw loose somewhere."