OOPS-A-DAISY Meaning of OOPS-A-DAISY in English ˈoops-a-ˌdaisy BrE AmE interjection [ Date: 1900-2000 ; Origin: upsy-daisy (19-21 centuries) , from up-a-day (18-19 centuries) ] said when a child falls Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012