unhinged
adjectiveUK /ʌnˈhɪndʒd/
US /ʌnˈhɪndʒd/
Very crazy or out of control.
The movie villain was completely unhinged and laughed at everything.
OTHER MEANINGS
2. Not attached by a hinge; taken off its hinges.
The wind blew the unhinged gate right off its post.
3. Behaving in a wildly unreasonable or uncontrolled way.
His unhinged rant at the meeting shocked everyone.
4. Mentally unbalanced or severely disturbed.
The character slowly became unhinged after weeks alone.