SPUR

noun

1. 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.
2. A jab given with the spurs.
3. Anything that inspires or motivates, as a spur does a horse.

verb

1. To prod (especially a horse) on the side or flank, with the intent to urge motion or haste, to gig.
2. To urge or encourage to action, or to a more vigorous pursuit of an object
3. To put spurs on.