washed out
A horse that becomes so nervous that it sweats profusely. Also known as “washy” or “lathered (up).”
weigh in (out)
The certification, by the clerk of scales, of a rider’s weight before (after) a race. A jockey weighs in fully dressed with all equipment except for his/her helmet, whip and (in many jurisdictions) flak jacket.
weight-for-age
An allowance condition in which each entrant is assigned a weight according to its age. Females usually receive a sex allowance as well. (Compare with a handicap race.)