Artificial intelligent assistant

jokist

jokist
  (ˈdʒəʊkɪst)
  [f. joke n. + -ist.]
  A professed or habitual joker.

1873 ‘Mark Twain’ & Warner Gilded Age xxxvi. 331 And here is The Jokist's Own Treasury. 1882 Pall Mall G. 8 June 3/2 Elaborate inventions palmed off upon an uncritical public by unscrupulous ‘jokists’. 1893 Daily Tel. 24 Apr. 5/4 Theodore Hook, the king of practical jokists.

Oxford English Dictionary

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