Definition of "unhinged"

After the screening, a large crowd filled the street outside the theater, playing spot-the-sublebrity with some of the film's prime characters, including Nirvana photographer Alice Wheeler and Love's estranged (and notoriously unhinged) father.

1998, SPIN, page 78

While ruling is going relatively well for Alicent, motherhood isn’t; her sons have both grown up to be real pieces of shit. Aemond (now played by Ewan Mitchell) has grown from a bullied child into a bullying adult; and it’s obvious from one look into his single eye that the bullied kid we met six years ago has grown up to be the most unhinged kind of sadist.

2022 October 10, Jenna Scherer, “House Of The Dragon drops its best episode yet”, in AV Club‎