set down
1) A suspension. For example, “The jockey was set down five days for careless riding.” 2) When a jockey assumes a lower crouch in the saddle while urging the horse to pick up speed. For example, “The horse was set down for the drive to the wire.”
shank
Rope or strap attached to a halter or bridle by which a horse is led.
shedrow
Stable area. A row of barns.
sheets
A handicapping tool assigning a numerical value to each race run by a horse to enable different horses running at different racetracks to be objectively compared.
show
Third position at the finish.
show bet
Wager on a horse to finish in the money; third or better.