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A person who is a step beyond crazy.
Watch out for the one with the funny look in her eye, I hear she's a total wackadoo.
by VAKI5 August 18, 2003
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2
A person that is crazy beyond belief and doesn't seem to notice.
Sabrina is a wackadoo.
by Robert February 15, 2005
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4
A person that loves to have fun all the time and tends to be a little goofy.
"Honey... why do you always have to be such a wackadoo?"

"You are such a wackadoo and that's why I love you so much!"
by PorscheBoxster2001 June 06, 2005
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7
General ado or excitement. Can be used as an exclamation to convey general high spirits, or sarcastically in response to an overzealous statement.
"Wackadoo troops! What a ripper party."

Chick: "And then she said that Harry has a big nose!"
Dude: "Well wackadoo. He does have a big schnoz."
by Heath Raftery August 10, 2007
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