61 Expressions for Insane

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around the bend, balmy, bananas, bats in the belfry, batty, bedlamite, bonkers, brainsick, buggy, bughouse, bugs, crackbrained, cracked, crackers, cracky, cranky, crazed, crazy, crazy as a coot, cuckoo, daffy, daft, demented, deranged, dippy, disordered, dotty, fruity, nutty as a fruitcake, half a bubble off plumb, having a screw loose, loco, looney, loopy, lunatic, mad, maniac, mental, non compos mentis, not all there, not having all ones marbles, not right in one's head, nuts, nutsy, nutty, off one's dot, off one's nut, a nut case, off one's rocker, off one's onion, one cookie short of a dozen, out of one's head, out of one's mind, screwy, teched, touched in the head, unbalanced, unsound, whako, wacky, wacked out, witless, wrong in the head.