The Collaborative International Dictionary of English v.0.48:

Hippodrome \Hip"po*drome\, v. i. [imp. & p. p. Hippodromed; p.
   pr. & vb. n. Hippodroming.] (Sports)
   To arrange contests with predetermined winners. [Slang, U.
   S.]
   [Webster 1913 Suppl.]