woo-hoo
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\ ˈwü-ˈhü 
, ˌwü- \
, ˌwü- \variants:
or whoo-hoo
Definition of woo-hoo
—used to express exuberant delight or approval
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Merriam-Webster unabridgedWords at Play
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Time Traveler for woo-hoo
The first known use of woo-hoo was in 1981
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