call
Running position of horses in a race at various points.
chalk
Wagering favorite in a race. Dates from the days when on-track bookmakers would write current odds on a chalkboard.
chalk player
Bettor who wagers on favorites.
check(ed)
When a jockey slows a horse due to other horses impeding its progress.
chestnut
A horse color which may vary from a red-yellow to golden-yellow. The mane, tail and legs are usually variations of coat color, except where white markings are present.
chute
Extension of backstretch or homestretch to permit a straight running start in a race as opposed to starting on or near a turn.