More neutral:
* Mentally ill: This is a broad term that covers a wide range of mental health conditions.
* Unstable: This suggests a lack of emotional control or unpredictable behavior.
* Disturbed: This implies a sense of mental or emotional distress.
* Off balance: This conveys a sense of being confused or disoriented.
* Out of their mind: This is a common phrase that suggests a lack of rational thinking.
More informal:
* Crazy: This is a colloquial term that can be used to describe someone who is eccentric or irrational.
* Bonkers: This is a slang term that means crazy or silly.
* Nuts: This is another slang term that means crazy or insane.
* Loony: This is a slang term that means crazy or foolish.
More formal:
* Psychotic: This refers to a severe mental illness characterized by delusions and hallucinations.
* Delusional: This suggests a belief in something that is not true, despite evidence to the contrary.
* Hallucinating: This refers to experiencing sensory perceptions that are not real.
* Disordered: This is a general term that suggests a mental or emotional disturbance.
It's important to note that using euphemisms can sometimes be insensitive or inaccurate. The best way to describe someone's mental state is to use language that is respectful and accurate.