joker /ˈdʒəʊkə/

• 1. 

  N-COUNT Someone who is a joker likes making jokes or doing amusing things. 爱开玩笑; 逗趣的人

  例：

  He is, by nature, a joker, a witty man with a sense of fun.

  他天生是个爱开玩笑的人，是个有幽默感的风趣男人。

• 2. 

  N-COUNT The joker in a deck of playing cards is the card that does not belong to any of the four suits. (纸牌中不属于任何一套花色的) 百搭牌

• 3. 

  N-COUNT You can call someone a joker if you think they are behaving in a stupid or dangerous way. 家伙 [非正式]

  例：

  Keep your eye on these jokers, you never know what they will come up with.

  盯住这些家伙，你永远不知道他们会想出什么来。