/'dʒəʊkə(r); `dʒokɚ/ n
1 (infml 口) person who is fond of making jokes; foolish irresponsible person 爱开玩笑的人; 愚蠢而不负责任的人
*Some joker's been playing around with my car aerial! 哪个爱胡闹的人摆弄我汽车上的天线了!
2 (infml 口) person who is not treated seriously 不受重视的人
*I don't want that jokerin my sales team. 我们销售部门不想要那个家伙.
3 extra playing-card used in certain card-games （某些纸牌戏中的）百搭.

n[C]
informal someone who behaves in a way you think is stupid
　Look at that joker - he's doing 25 miles an hour at the most.
a playing card that has no fixed value and is only used in some card games
someone who makes a lot of jokes
the joker in the pack
something or someone whose effect on future events cannot be known