joker

joker
noun
  1. a person who is fond of joking
    爱开玩笑的人
    ■(informal)a foolish or inept person
    (非正式)傻瓜,笨蛋
    a bunch of jokers.
    一群笨蛋。
  2. a playing card, typically bearing the figure of a jester, used in some games as a wild card
    (扑克牌)大王;小王
  3. (US)a clause unobtrusively inserted in a bill or document and affecting its operation in a way not immediately apparent
    (美)伏笔,曲笔(在法案或文件中插入的不显眼条款,其作用影响并不会立即被察觉)
派生
the joker in the pack
  1. a person or factor likely to have an unpredictable effect on events
    诡秘的人(或因素),难以捉摸的人(或因素)
语源
  1. early 18th cent.: from the verb joke + -er
英语宝典
考试词汇表