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

 

flibbertigibbet

 noun
noun
BrE BrE//ˈflɪbətidʒɪbɪt//
 
; NAmE NAmE//ˈflɪbərtidʒɪbɪt//
 
; BrE BrE//ˌflɪbətiˈdʒɪbɪt//
 
; NAmE NAmE//ˌflɪbərtiˈdʒɪbɪt//
 
(informal)
 
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a person who is not serious enough or talks a lot about silly things Word Origin late Middle English: probably imitative of idle chatter.
See the Oxford Advanced American Dictionary entry: flibbertigibbet