OaksA stakes event for three-year-old fillies.
ObjectionClaim of foul lodged by rider, patrol judge or other official after the running of a race. If lodged by official, it is called an inquiry.
Odds-onOdds of less than even money.
Official1) Notice displayed when a race result is confirmed. 2) Used to denote a racing official.
Off-track BettingWagering at legalized betting outlets usually run by the tracks, management companies specializing in parimutuel wagering, or, in New York State, by independent corporations chartered by the state. Wagers at OTB sites are usually commingled with on-track betting pools.
On the BitWhen a horse is eager to run. Also known as "in the bridle."
On the BoardFinishing among the first three.
On the MuscleDenotes a fit horse.
On the NoseBetting a horse to win only.
OTBAbbreviation for off-track betting.
Out of the MoneyA horse that finishes worse than third.
OverlayA horse going off at higher odds than it appears to warrant based on its past performances.
OvernightA sheet published by the racing secretary's office listing the entries for an upcoming racing card.
Overnight RaceA race in which entries close a specific number of hours before running (such as 48 hours), as opposed to a stakes race for which nominations close weeks and sometimes months in advance.
OverweightSurplus weight carried by a horse when the rider cannot make the required weight.