Related Clues:

• Out of one's gourd
• In ___ parentis (legal doctrine)
• Daft
• Batty
• Nuts or crackers, take your pick
• Off one's trolley
• Crazed
• Screwy
• Lead-in to motion
• Crazy in Canczn
• Out of one's mind
• 'Round the bend
• Belonging in a bughouse
• Out in left field
• Touched