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3. be out of head

be out of head

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be out of your head

  (British, American & Australian informal) also be off your head (British & Australian informal)

1. to be crazy He took the car out in this weather - he must be off his head!

2. to not be in control of your behaviour because of the effects of alcohol or drugs She's completely off her head, she is - what's she been drinking?

See also: head, of, out