coaxer noun in horse racing, a battery-powered device used illegally by a jockey to shock a horse during a race US
Frank Wolverton of Santa Rosa, Cal., “a track follower,” today was suspended by the Lone Oak Racing Track Board of Stewards for manufacturing electrical “coaxers” allegedly used to stimulate horses in two races. — SanFranciscoNews, p. 21, 7 September 1951