jok·er /ˈʤokɚ/
  詼諧者,家夥,取巧
  Jok·er n.
  1. One who makes jokes or jests.
  2. Card Playing See Best bower, under 2d Bower.
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  joker
       n 1: a person who enjoys telling or playing jokes [syn: jokester]
       2: a person who does something thoughtless or annoying; "some
          joker is blocking the driveway" [syn: turkey]