The Collaborative International Dictionary of English v.0.48:

Gammon \Gam"mon\ (g[a^]m"m[u^]n), v. t. [imp. & p. p. Gammoned
   (g[a^]m"m[u^]nd); p. pr. & vb. n. Gammoning.]
   To make bacon of; to salt and dry in smoke.
   [1913 Webster]