noun
a noisy, exuberant celebration or party
interjection
used to express excitement or joy
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The audience erupted in cheers and applause, expressing their joy with a resounding 'whoopee'.
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I won the lottery! Whoopee!
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I aced my exam, so I'm going out to celebrate with some whoopee!
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His promotion at work was like winning the jackpot, he couldn't contain his whoopee.