The Collaborative International Dictionary of English v.0.48:

findy \fin"dy\ (f[i^]n"d[y^]), a. [AS. finding heavy; cf. Dan.
   fyndig strong, energetical, fynd strength, energy, emphasis.]
   Full; heavy; firm; solid; substantial. [Obs.]
   [1913 Webster]

         A cold May and a windy
         Makes the barn fat and findy.            --Old Proverb.
   [1913 Webster]