Definition of oo-er exclamation from the Oxford Advanced Learner's Dictionary

 

oo-er

 exclamation
exclamation
BrE BrE//ˌuː ˈɜː(r)//
 
; NAmE NAmE//ˌuː ˈɜːr//
 
(humorous)
 
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used for expressing surprise, especially about something sexual Word Origin early 20th cent.: from the interjections ooh and er.