mossyback

noun4

1. •
   (US, informal) A person with old-fashioned views; hence, one who is very conservative or reactionary; a mossback.
2. •
   (US, no longer used) A fish that is large and old, especially one that has algae growing on its back; a mossback.
3. •
   (informal, no longer used) Synonym of mossback (“a person who stayed hidden to evade conscription (especially by the Confederate States Army) during the American Civil War (1861–1865)”).
4. •
   (US, no longer used) The menhaden, mossbanker, or mossbunker, a marine fish of the genus Brevoortia or Ethmidium.