Artificial intelligent assistant

back-racket

ˈback-ˌracket Obs.
  [f. back adv.]
  The return of a ball in tennis; fig. a counter-charge, ‘tu quoque.’

1608 Middleton Trick to Catch iv. i, He plays at back-racket with me. 1638 Featly Transubst. 3 Bandie the tearmes of Schismatike and Heritike..the Sorbonists to the Jesuites, and the Jesuites by back-racket to the Sorbonists.

Oxford English Dictionary

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