The Collaborative International Dictionary of English v.0.48:

Steatopygous \Ste`a*top"y*gous\ (-g[u^]s), a.
   Having fat buttocks.
   [1913 Webster]

         Specimens of the steatopygous Abyssinian breed.
                                                  --Burton.
   [1913 Webster] Stedfast
   Sted