Definition of "whippersnapper"

whippersnapper

/ˈwɪpəˌsnæpə/

noun
plural whippersnappers
1. (colloquial, dated) A young and cheeky or presumptuous person; often with a connotation of ignorance via inexperience.
  Quotations
  Eisenhower thought that the President-elect, his junior by over 25 years, was merely a "young whippersnapper."
  2004, Chris Wallace, Character: Profiles in Presidential Courage