Today's SE - Gardets Galopp Horse Racing Picks

Minus Pool

A pari-mutuel pool – typically a show pool - where one horse is so heavily bet that after deductions there is not enough money left to cover the prescribed minimum on each bet.

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

Apprentice

A new jockey who has not ridden a certain number of winners in a specified time period.