wacko or whacko /wakˈō/ (slang)

1. Mad
2. Eccentric

A deranged or eccentric person

• fretfulnesses
• fretless
• frets
• fretsaw
• fretsaws
• fretted
• frettier
• frettiest
• fretting
• frettings
• fretty
• fretwork
• fretworks
• Freudian
• Freudian slip
• Freudian slips
• FRG
• Fri.
• friabilities
• friability
• friable
• friableness
• friablenesses
• friand
• friande