whippersnappers
n. 傲慢的傢伙,自以為了不起的年輕人,不重要的人( whippersnapper的名詞複數 )
If you refer to a young person as a whippersnapper, you disapprove of them because you think that they are behaving more confidently than they should.
...this bunch of irresponsible young whippersnappers.
這群不負責任自以為是的年輕人