Wacko

21 clues
Loon
Kook
Nuts
Loony
Crazy
Screwy
Bananas
Nut job
Nutcase
Far out!
Screwball
Loony tune
Odd fellow
Off the wall
Totally nuts
Beyond silly
More than odd
Eccentric sort
Eccentric type
More than eccentric
Nutty as a fruitcake
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