whoop-de-do interjection
or whoop-de-doo /ˌwuːpdiˈduː/ /ˌwʊpdiˈduː/ or whoop-de-doo /ˌwuːpdiˈduː/ /ˌwʊpdiˈduː/ Learner's definition of WHOOP-DE-DO
US, informal
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used in an ironic way to say that something is not important or impressive有什么了不起(用作讽刺之意,指某事不重要或没什么大不了的)