know-it-alls

英

美 [noʊ ɪt ɔlz]

n.  自以为无所不知的人; 万事通
know-it-all的复数

柯林斯词典

• 自以为无所不知的人；百事通
  If you say that someone is aknow-it-all, you are critical of them because they think that they know a lot more than other people.

in BRIT, use 英国英语用 know-all

双语例句

• The voters in the market referendum are overpaid know-it-alls whose opinions count for little relative to the shrewd assessment of the wise observer, who is not swept up in the intrigues of Mr Market's court.
  市场公投中的投票者是一些钱拿得过多、自以为无所不知的人，相对于没有被市场先生领地上的阴谋扫地出门的精明观察者的精明评估，他们的观点无足轻重。
• I think a lot of leaders are know-it-alls.
  我认为，许多领导者会自认为无所不知。