Lasix

A medication for the treatment of bleeding in horses that is legal in North America, but not all worldwide jurisdictions.

Bobble/Stumble

A slip or a duck from a horse trying to leave the starting gates, often caused by the surface giving way under the feet. This can range from a mild misstep to a stumble down to their knees.

Bullet

A bullet, or bullet workout, is a workout that was clocked as the best time for a certain distance on a given day.