out of one's head adj. phr.,
informal Acting in a crazy way; especially, wildly crazy.
The patient was feverish and out of his head and had to be watched.
Her friends thought she was out of her mind to marry that man. Compare: OFF ONE'S ROCKER.
Antonym: COME TO ONE'S SENSES.
[TahlilGaran] English Idioms Dictionary ▲