Bats
Else clues• A bit bonkers
• A bit eccentric
• A bit peculiar
• A bit wacko
• Bonkers
• Crackers
• Crazy
• Daft
• Ditsy
• Eccentric
• Eccentric, to put it nicely
• Eccentric: sl.
• Missing a few marbles
• Not all there
• Not too sensible
• Nutso
• Nutty as a fruitcake
• Off one's trolley
• Offbeat
• Punch-drunk
• Responding to medication, perhaps
• Slightly daft
• Slightly nuts
• Whimsically nutty