Doolally

My neighbor is convinced that the government is spying on him; I think he's a bit doolally.

The hospital staff was kind to the doolally patient.

The rumors about the pop star going doolally have been circulating for months.

The doolally cult leader convinced his followers to give him all their money.

The doolally patient in the mental hospital was throwing chairs at the staff.

The old woman was muttering to herself like a doolally.