Moss'back` noun A veteran partisan; one who is so conservative in opinion that he may be likened to a stone or old tree covered with moss. [ Political Slang, U.S.] Found on http://www.encyclo.co.uk/webster/M/105
Mossback is American political slang for someone who is so conservative in opinion that they may be likened to a stone or an old tree covered with moss. Found on http://www.probertencyclopaedia.com/browse/ZM.HTM