off your head

off (one's) head

1. Crazy, insane, or eccentric. Often used humorously or sarcastically. Primarily heard in UK, Ireland. I think you're off your head for changing careers this late in life, but, hey, follow your dreams. He's off his head if he thinks he can get that engine fixed by this weekend. My auntie likes to let people think she's off her head, but she's actually incredibly clever and witty.2. Severely intoxicated by alcohol or drugs. Primarily heard in UK, Ireland. No wonder he's failing—he's off his head every night! We all popped the pills and were off our heads by the time the concert started.See also: head, off

off your head

BRITISH, INFORMAL or

out of your head

INFORMAL1. If someone is off their head or out of their head, they are crazy. You must be off your head to live in this area. If he didn't kill anybody it was only by luck because he was out of his head and screaming like a maniac.2. If someone is off their head or out of their head, they have taken so many drugs or drunk so much alcohol that they do not know what they are doing. Basically, this song sounds great when you're off your head on Ecstasy. These days I get out of my head on one glass of wine.See also: head, off

off (or out of) your head

1 mad or crazy. 2 extremely drunk or severely under the influence of illegal drugs. informalSee also: head, off

out of/off your ˈhead

(British English, informal)
1 crazy: Are you off your head?
2 not knowing what you are saying or doing because of the effects of alcohol or drugs: Don’t even try to have a proper conversation with him — he’s off his head.See also: head, of, off, out