/ ˈdʒəʊkə(r); NAmE ˈdʒoʊk-/ noun
1.
a person who likes making jokes or doing silly things to make people laugh
2.
( informal ) a person that you think is stupid because they annoy you
3.
an extra playing card that is used in some card games, usually as a wild card
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IDIOMS
- the joker in the pack
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WORD ORIGIN
early 18th cent.: from the verb joke + -er .