English version

whippersnapper in Youth topic

From Longman Dictionary of Contemporary Englishwhippersnapperwhip‧per‧snap‧per /ˈwɪpəˌsnæpə $ ˈwɪpərˌsnæpər/ noun [countable]  old-fashionedSSYRUDE/IMPOLITE a young person who is too confident and does not show enough respect to older people
Examples from the Corpus
whippersnapperAn older Tony Gwynn must compete only with that whippersnapper and a young Dave Winfield with an aversion to the right-field wall.