E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A secret agrarian association organised in Ireland about the year 1759. So called because they wore white shirts in their nightly expeditions. In 1787 a new association appeared, the members of which called themselves Right-boys. The Whiteboys were originally called Levellers, from their throwing down fences and levelling enclosures. (See LEVELLERS.)