Have a screw loose synonyms | phrases

Phrases with similar meaning for Have a screw loose

• have bats in the belfry
• mentally ill
• of unsound mind
• sick in the head
• non compos mentis
• mad as a hatter
• mad as a March hare
• nutty as a fruitcake
• not right in the head
• round the bend
• around the bend
• raving mad
• not all there
• not right upstairs