Source : Webster's Revised Unabridged Dictionary (1913)

Jargon \Jar"gon\ (j[aum]r"g[o^]n), v. i. [imp. & p. p.
   {Jargoned} (-g[o^]nd); p. pr. & vb. n. {Jargoning}.]
   To utter jargon; to emit confused or unintelligible sounds;
   to talk unintelligibly, or in a harsh and noisy manner.

         The noisy jay, Jargoning like a foreigner at his food.
                                                  --Longfellow.