Dover Downs - Race 4

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

Underlay

A horse that is going off at lower odds than it deserves based on performance.

Tack

The equipment the horse wears, including saddle and bridle. A jockey typically has their own racing saddle, placed on each horse they ride just before the race.