The Collaborative International Dictionary of English v.0.48:

Stomachy \Stom"ach*y\, a.
   Obstinate; sullen; haughty.
   [1913 Webster]

         A little, bold, solemn, stomachy man, a great professor
         of piety.                                --R. L.
                                                  Stevenson.
   [1913 Webster]