unhinged
adj.adj. behaving in a way that is very strange, wild, or mentally unstable. It is often used to describe someone who has lost control of their actions or thoughts.
adj. mentally unbalanced or deranged; characterized by erratic and unstable behavior. In contemporary informal contexts, it frequently describes extreme or wildly inappropriate social media posts or public outbursts.
His latest social media posts are completely unhinged.
The movie features an unhinged villain whose plans for world domination make very little sense.
What began as a mild disagreement quickly spiraled into an unhinged rant that left everyone in the boardroom feeling deeply uncomfortable and concerned for his well-being.
Commonly used as a predicative adjective following linking verbs like 'seem', 'sound', or 'become'.