Artificial intelligent assistant

stirrup-oil

stirrup-oil jocular.
  [Cf. stirrup-leather b.]
  (See quots.)

1679 Coles Eng.-Lat. Dict. (ed. 2), To give one some Stirrup-oyl, aliquem fustigare. 1825 Hone Every-day Bk. I. 411 They send to a cobbler's for a pennyworth of the best ‘stirrup-oil.’ 1854 A. E. Baker Northampt. Gloss. s.v., One of the old jokes practised on the 1st of April is the sending a raw lad to a saddler's or cobler's for a ‘penn'orth of stirrup-oil,’ when he is termed an April fool, and his ignorance enlightened by the application of a stirrup-leather across his shoulders.

Oxford English Dictionary

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