jargoning

Your baby's simple babbling now has probably morphed into complex "jargoning."

Sometimes a-dropping from the sky I heard the sky-lark sing; Sometimes all little birds that are, How they seemed to fill the sea and air With their sweet jargoning!

One complete month this Parlement has spent in mere idle jargoning, and sound and fury; the Timbre Edict not registered, or like to be; the Subvention not yet so much as spoken of.

As this was in my mind, the first grey stole into the sky so that I could see the black branches overhead; and now there awoke the cries of birds, and soon the wood was full of their sweet jargoning.