Nothing to do with spurs, they tend to get caught on things and puncture the floats if you ditch. northseaspray's right, it's normally used to denote a person who is unscrupulous and unqualified in business, especially cowboy builders. It's also taken to mean a reckless person, such as a driver, pilot, or manager, who ignores potential risks.
However, in your case we'll take it as meaning you're really sharp and make a jangly noise as you walk around
