Source : Webster's Revised Unabridged Dictionary (1913)

Shedder \Shed"der\, n.
   1. One who, or that which, sheds; as, a shedder of blood; a
      shedder of tears.

   2. (Zo["o]l.) A crab in the act of casting its shell, or
      immediately afterwards while still soft; -- applied
      especially to the edible crabs, which are most prized
      while in this state.

Source : WordNet®

shedder
     n : an attacker who sheds or spills blood; "a great hunter and
         spiller of blood" [syn: {spiller}]