Today's SE - Umaker Horse Racing Picks

Pari-Mutuel

A pool style wagering system, where all money input through betting is divided among those with winning tickets (save for various deductions by the track operators).

Bleeder

A horse that bleeds due to a ruptured blood vessel during a race or workout. The medication Lasix can fix this problem.

Workout

A workout is a timed sprint over varying distances prior to a race, meant to get a horse fit enough for competition.