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Whatadabadoo is used to explain a feeling of joyful relief.

It is a combination of Yabadabadoo from the Flintstones and the confusion affiliated with the exclamation of what to produce an expression of joyful relief. Most commonly used after a brain straining stressful period.
Whatadabadoo! I'm so glad exams are over
by Pebbles Flintstone July 09, 2018
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