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whoop–de–do

whoop–de–do interjection
or whoop–de–doo /ˌwuːpdiˈduː/ /ˌwʊpdiˈduː/
whoop–de–do
interjection
or whoop–de–doo /ˌwuːpdiˈduː/ /ˌwʊpdiˈduː/
Britannica Dictionary definition of WHOOP–DE–DO
US, informal
used in an ironic way to say that something is not important or impressive