Definition of whoop-de-do exclamation from the Oxford Advanced American Dictionary

 

whoop-de-do

 exclamation
exclamation
NAmE//ˌwup di ˈdu//
 
, NAmE//ˌwʊpdi ˈdu//
 
, NAmE//ˌhupdi ˈdu//
 
(informal)(ironic)
 
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used to tell someone that something they have just said does not impress you very much So she runs five miles a day. Whoop-de-do!