From Longman Dictionary of Contemporary Englishwhoopeewhoo‧pee1 /wʊˈpiː/ interjection HAPPYa shout of happiness
Examples from the Corpus
whoopee• Whoopee! I won!whoopeewhoop‧ee2 /ˈwʊpi/ noun old-fashioned → make whoopeeExamples from the Corpus
whoopee• Whatever justice may say, the whoopee in the building societies' camp was soon cut short.Origin whoopee1 (1800-1900) whoop 