мозги не туда повернуты

• МОЗГИ НАБЕКРЕНЬ <НЕ НА МЕСТЕ, НЕ ТУДА ПОВЕРНУТЫ> у кого highly coll, derog

[VPsubj with быть, usu. pres; fixed WO]

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⇒ s.o. does not think rationally, is odd in his thinking:

- у X-a мозги набекрень{{}}≈ X's head is on backward;

- X's head isn't on straight;

- X is not playing with a full deck;

- X is a crackpot.

     ♦ "Владька, где там твой старый хрыч?.. Мать его в железку... мозги набекрень" (Максимов 2). "And what about that old fogey of yours, Vlad?. God damn him, the old crackpot" (2a)