The Collaborative International Dictionary of English v.0.48:

Braxy \Brax"y\, n. [Cf. AS. breac rheum, broc sickness, Ir.
   bracha corruption. Jamieson.]
   1. A disease of sheep. The term is variously applied in
      different localities. [Scot.]
      [1913 Webster]

   2. A diseased sheep, or its mutton.
      [1913 Webster]