JOCK'EY, noun [said to be from Jackey, a diminutive of Jack, John; primarily, a boy that rides horses.] 1. A man that rides horses in a race. 2. A dealer in horses; one who makes it his business to buy and sell horses for gain. Hence, 3. A cheat; one who deceives or takes undue advantage in trade. JOCK'EY, verb transitive To cheat; to trick; to deceive in trade. 1. To jostle by riding against one.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI