-
N-COUNT
愛開玩笑的人；逗趣的人
Someone who is a joker likes making jokes or doing amusing things.
例句
He is, by nature, a joker, a witty man with a sense of fun.
他天性是個愛開玩笑的人，說話詼諧，很有幽默感。
-
N-COUNT
（紙牌中的）百搭牌，王牌
The joker in a pack of playing cards is the card which does not belong to any of the four suits.
-
N-COUNT
愚蠢的人；舉止危險的人；小丑
You can call someone a joker if you think they are behaving in a stupid or dangerous way.
例句
Keep your eye on these jokers, you never know what they will come up with.
留神那些活寶，你永遠也不知道他們會想出什么樣的主意。
-
PHRASE
與眾不同的人（或事物）；難以捉摸的人（或事物）
If you describe someone or something as the joker in the pack, you mean that they are different from the other people or things in their group, and can be unpredictable.