or pretty horsebreaker, subs. (colloquial).—A woman (c. 1860), hired to ride in the park; hence, a riding courtesan. See also quot. 1864. For synonyms, see BARRACK-HACK and TART.

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  1864.  YATES, Broken to Harness, ch. iv., p. 33 (1873). Kate Mellon was a HORSEBREAKER, a bonâ-fide horsebreaker; one who curbed colts, and ‘took it out of’ kickers and rearers.

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  1865.  Public Opinion, 30 Sept. These demi-monde people, anonymas, HORSE-BREAKERS, hetairæ … are by degrees pushing their way into society.

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