Definition of whippersnapper noun from the Oxford Advanced American Dictionary

 

whippersnapper

 noun
noun
NAmE//ˈwɪpərˌsnæpər//
 
(old-fashioned)(informal)
 
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a young and unimportant person who behaves in a way that others think is too confident and rude
See the Oxford Advanced Learner's Dictionary entry: whippersnapper