Today's SE - Aby Horse Racing Picks

Handicap

A race where a handicapper has assigned weights to be carried by all runners on the basis of their past racing efforts.

Exercise Rider

A rider built much like a jockey but is employed for exercising and working out horses in the morning.

Trifecta

A wager picking the first, second and third horses in the exact order. A trifecta box means paying more to ensure the horses can finish in any order in the top three spots.