wacko or whacko /wakˈō/ (slang)

1. Mad
2. Eccentric

A deranged or eccentric person

• schooldays
• school-divine
• school-divinity
• school doctor
• school doctors
• schoole
• schooled
• schooleries
• schoolery
• school experience
• schoolfellow
• schoolfellows
• school-friend
• school-friends
• school-friendship
• school-friendships
• schoolgirl
• schoolgirlish
• schoolgirls
• schoolgoing
• smokescreens
• smoke signal
• smoke signals
• smokestack
• smokestack industries