Green’s Dictionary of Slang

(US) chatty, verbose; self-opinionated.

1885		Observer and Freelance (Wellington) 5 Sept. 3/3: There’s Garrett the talky.
1899–1900		C.L. Cullen Tales of the Ex-Tanks 46: There was one of those here talky sports that knew how the thing was going to wind up.
1922		Wash. Times (DC) 6 Mar. 16/8: Bob Fitzsimmons was a talky fellow.