Definition of teenybopper noun from the Oxford Advanced Learner's Dictionary

 

teenybopper

 noun
noun
BrE BrE//ˈtiːnibɒpə(r)//
 
; NAmE NAmE//ˈtiːnibɑːpər//
 
(old-fashioned, informal)
 
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a young girl between the ages of about 10 and 13, who is very interested in pop music, fashionable clothes, etc.
See the Oxford Advanced American Dictionary entry: teenybopper