mossback

noun6

1. •
   (US) A turtle that, because of its age, has a growth of algae on its back
2. •
   (US, informal) Synonym of mossyback (“a person with old-fashioned views; hence, one who is very conservative or reactionary”).
3. •
   (US) Synonym of mossyback (“a fish that is large and old, especially one that has algae growing on its back”).
4. •
   (US) A common snapping turtle (Chelydra serpentina).
5. •
   (US, informal) A person who stayed hidden to evade conscription (especially by the Confederate States Army) during the American Civil War (1861–1865); a mossyback.
6. •
   (US) A largemouth bass or moss bass (Micropterus salmoides).