Definition of "smatter"

What standest thou there all the day smatterynge

1533, John Heywood, A Mery Play Betwene the Pardoner and the Frere‎, London: Wyllyam Rastell

And why, my lady wisdom? hold your tongue,Good prudence; smatter with your gossips, go.

c. 1591–1595 (date written), William Shakespeare, “The Tragedie of Romeo and Ivliet”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene v]

For poets, law makes no provision; / The wealthy have you in derision: / Of state affairs you cannot smatter; / Are awkward when you try to flatter;

1733, Jonathan Swift “On Poetry” in The Poetical Works of Jonathan Swift, London: William Pickering, 1833, Volume 2, pp. 63-64

The languages of Polynesia are easy to smatter, though hard to speak with elegance.

1891, Robert Louis Stevenson, chapter 2, in In the South Seas‎, New York: Scribner, published 1896, page 9