n. [capitalized] A Northern English and Scotch diminutive of Jock, Jack; specifically, a Scotchman.n. A strolling minstrel.n. A groom; a rider or driver of horses; specifically, a man or boy employed to ride horses in races.n. A dealer in horses; especially, a horse-dealer who is given to cheating; a tricky horse-trader: more commonly called a horse-jockey.n. A cheat; one who deceives or takes undue advantage in trade: from the reputation of horse-traders for trickery.n. In coal-mining, a self-acting apparatus carried on the front tub of a set for releasing it from the hauling-rope at a certain point.n. In mech., same as jockey-wheel.n. A thin walking-stick.To play the jockey to; trick; deceive in trade; hinder or defeat by trickery.To jostle against in racing.To act in the manner of a jockey; seek unfair advantage in a race, in dealing, etc.n. Same as jockey-weight.