flibbertigibbet

noun
🔊/ˈflɪbətidʒɪbɪt/
🔊/ˈflɪbərtidʒɪbɪt/
(old-fashioned, informal)
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  1. a person who is not serious enough or talks a lot about silly things轻浮的人;饶舌的人
    Word Originlate Middle English: probably imitative of idle chatter.