a.1.Speaking without reserve.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
In an apartment of the forecourt overlooked by cooing doves he would sit, while she laid aside her useless veil and chattered of spirits and fiends of Kulu, of grandchildren unborn, and of the free-tongued brat who had talked to her in the resting-place.
They delight in telling me that the old man is now being assisted solely by male carers as he proved a bit too feisty and free-tongued for the females.