moss-trooper

from WordNet (r) 3.0 (2006)

moss-trooper
    n 1: a marauder and plunderer (originally operating in the bogs
         between England and Scotland)

from The Collaborative International Dictionary of English v.0.48

Mosstrooper \Moss"troop`er\, n. [Moss + trooper.]
   One of a class of marauders or bandits that formerly infested
   the border country between England and Scotland; -- so called
   in allusion to the mossy or boggy character of much of the
   border country.
   [1913 Webster]