spin v. in horseracing, to renege on an agreement to have a jockey ride a racehorse. (source: Double-Tongued Dictionary)
spin v.— «Agents often make early commitments to more than one horse in a race, figuring that the field will thin out by the time post positions are drawn. But if both horses enter, one of the trainers will be jilted. Jockeys also can...
spin v.— «“Spinning” is the racetrack term for maneuvering by which agents change mounts shortly before entries are taken, or trainers change riders.» —“Jockey Agents Always On Alert ‘Spinning’ Causes Backstretch...
tack v.— «A rider’s saddle and gear weighs about four pounds, so he needs to weigh 112 if he intends to, in racing parlance, “tack” at 116.» —“Jockeys play weighting game” by Jim Wells Pioneer...
flip v.— «Bulimia is prevalent enough that jockeys casually refer to it as flipping, or heaving.» —“Pound for Pound, a Most Dangerous Sport; Bulimia Common Among Jockeys” by Joe Sierra Washington Post Apr. 28...
flip v.— «Not even high-fashion models watch their weight closer than jockeys do. Ideally, a jockey should weigh 112 or less. “A lot of jocks eat, eat, eat and then puke, puke, puke. It becomes habitual with them. We call ‘em...