A ruffian can be defined as 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 racehorse Ruffian (film), 2007 television movie about the racehorse Ruffian, a chess engine Border Ruffians, pro-Slavery activists from Kansas in the American Civil War The Ruffian on the Stair, a British play HMS Bellerophon (1786), also known as Billy Ruffian The Ruffians, the major antagonis… (More on Ruffian)