1. (noun)Rebel, Reb, Johnny Reb, Johnny, greyback `Johnny' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War; `greyback' derived from their greyConfederate uniforms
2. (noun)insurgent, insurrectionist, freedom fighter, rebel a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)