A ruffian is a scoundrel, rascal or unprincipled, deceitful, and unreliable person. (External Link) As a proper noun, Ruffian may refer to:Ruffian (horse), a famous thoroughbred filly racehorseRuffian (film), 2007 television movie about the racehorseRuffian, a chess engineBorder Ruffians, pro-Slavery activists from Kansas in the American Civil WarThe Ruffian on the Stair, a British playHMS Bellerophon (1786), also known as Billy RuffianThe Ruffians, the major antagonists of the Nintendo game Sin… (More on Ruffian)