The Collaborative International Dictionary of English v.0.48:

Jockeyship \Jock"ey*ship\, n.
   The art, character, or position, of a jockey; the personality
   of a jockey.
   [1913 Webster]

         Go flatter Sawney for his jockeyship.    --Chatterton.
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         Where can at last his jockeyship retire? --Cowper.
   [1913 Webster]