Green’s Dictionary of Slang

1. a garrulous, verbose person.

1883		Central New Jersey Home News (New Brunswick, NJ) 22 Sept. 4/2: He had some snifty old proffs [sic] there, bet your sweet life [...] Prof. Wiggins was a snifty chinner at the music box, too.
1893		J. Hawthorne Confessions of Convict 29: Hope was a ‘smooth chinner’.
1899–1900		C.L. Cullen Tales of the Ex-Tanks 46: I like to call a chinner’s bluff.
1902		Truth (Brisbane) 23 Feb. 3/5: This ’ere chinner / Are a miserabul sell.

2. an actor, a performer.

1902		Ade Forty Modern Fables 256: He had developed into a Star Chinner, so that he could Talk Low to almost any one of them and make believe that of all the Flowers that ever bloomed she was the one and only $30,000 Carnation.
1910		H. Hapgood Types from City Streets 181: She ‘acted’ for a while in Chuck Connor’s play, and was one of the best chinners among all the ‘rags’.