fee
1) Amount paid to a jockey for riding in a race. 2) The cost of nominating, entering or starting a horse in a stakes race.
field
The horses in a race.
fire
A burst of acceleration by a horse in a race. For example, “The horse did (didn’t) fire when asked.”
flatten out
A very tired horse that slows considerably, dropping its head on a straight line with its body. Some horses, however, like to run with their heads lowered.
fractional time
Intermediate times recorded in a race, as at the quarter, half, three-quarters, etc. The “quarter time,” for example, refers to the time after the first quarter-mile, not the first 25 percent of the race.
front-runner
A horse whose running style is to attempt to get on or near the lead at the start of the race and to continue there as long as possible.
furlong
One-eighth of a mile, 220 yards, 660 feet.