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From The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster] The noisy jay, Jargoning like a foreigner at his food. --Longfellow. [1913 Webster]