моча в голову ударила

• МОЧА В ГОЛОВУ УДАРИЛА кому highly coll, derog

[VPsubj; this form only; the verb may take the initial position, otherwise fixed WO]

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⇒ s.o.'s behavior, actions etc are foolishly illogical or abnormal:

- X-y моча в голову ударила{{}}≈ X is ( must be) crazy (off his rocker, off his nut, out of his mind);

- X must have lost his wits (his marbles).

     ♦ Как? возмущался Марлен Михайлович. Даже без всякого классового сознания, без ненависти к победоносным массам, а только лишь из чистого любопытства гнусный аристократишка отвернул исторический процесс, просто моча ему в голову ударила (Аксёнов 7). How could it be? the young Marlen Mikhailovich would ask himself, bewildered. Without a drop of class consciousness, without a trace of hatred for the victorious masses, with no more than a morbid sense of curiosity, this ratty little aristocrat changed the course of world history. He must have been crazy, out of his mind (7a).