snippersnapper

/ˈsnɪpərˌsnæpər/
noun
  1. A young person who is considered unimportant, impertinent, or overly talkative.
    • The old librarian told the snippersnapper to quiet down.
    • A group of snippersnappers were giggling in the back of the classroom.
    • Don't be such a snippersnapper; listen to your elders.
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