Artificial intelligent assistant

vituperant

viˈtuperant, a. and n. rare.
  [ad. L. vituperant-, vituperans, pr. pple. of vituperāre to vituperate. Cf. OF. vituperant (Godef.).]
  a. adj. Abusive, vituperative. b. n. A vituperator.

1864 Realm 17 Feb. 7 We do not think..that the most vituperant colonel would express such strong opinions. 1889 Pall Mall G. 16 Oct. 5/1 Whilst Lord Salisbury came here as your most exalted vituperant, you are journeying hither as his most obedient and faithful adulator!

Oxford English Dictionary

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