Actually, the correct spelling is 'busby'. A quick look on Google revealed this: "Possibly the name's original sense of a "busby wig" came from association with Dr Richard Busby, headmaster of Westminster School in the late seventeenth century; the later phrase buzz wig may have been derived from busby. An alternative explanation is that the British hussar cap of the early 19th century was named after the hatter who supplied the officer's version—W. Busby of the Strand London." Source: http://en.wikipedia.org/wiki/Busby