Across the Board

Refers to betting on a horse to finish first, second, and third to cover any of those scenarios happening during a race

Blinkers

A hood worn on a horse’s head to limit side vision, which can improve concentration. Blinkers are added or removed to relax a horse or give it more focus.

Handicap

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