bloody-minded

from WordNet (r) 3.0 (2006)

bloody-minded
    adj 1: stubbornly obstructive and unwilling to cooperate;
           "unions...have never been as bloody-minded about
           demarcation as the shipbuilders"- Spectator [syn:
           {bloody-minded}, {cantankerous}]
    2: marked by eagerness to resort to violence and bloodshed;
       "bloody-minded tyrants"; "bloodthirsty yells"; "went after
       the collaborators with a sanguinary fury that drenched the
       land with blood"-G.W.Johnson [syn: {bloodthirsty}, {bloody-
       minded}, {sanguinary}]

from The Collaborative International Dictionary of English v.0.48

Bloody-minded \Blood"y-mind"ed\, a.
   Having a cruel, ferocious disposition; bloodthirsty.
   --Dryden.
   [1913 Webster]