A rigid implement, often roughly y-shaped, that is fixed to one's heel for the purpose of prodding a horse. Often worn by, and emblematic of, the cowboy or the knight.
User Defined Definitions
"a verbalization that encourages you to attempt something"
"any sharply pointed projection"
"tubular extension at the base of the corolla in some flowers"
"a sharp prod fixed to a rider's heel and used to urge a horse onward"