Source : Webster's Revised Unabridged Dictionary (1913)

Gam \Gam\, v. i. [imp. & p. p. {Gammed}; p. pr. & vb. n.
   {Gam"ming}.] (Naut.)
      (a) To gather in a gam; -- said of whales.
      (b) To engage in a gam, or (Local, U. S.) in social
          intercourse anywhere.

Source : WordNet®

gamming
     See {gam}