blabbermouthed

comparative more blabbermouthed · superlative most blabbermouthed

1. Talkative, especially in an indiscreet manner.

   Maybe I'll live long enough to see a newspaper reporter depicted on the screen as a gentleman, not a drunken, blabbermouthed, wise-cracking bum.

   1947 March 31, Kaspar Monahan, “Show Shops”, in Pittsburgh Press, retrieved 27 Jul 2010, page 12

   1 more example

   The truth was that all this Freudian sex talk was the preview, a blabbermouthed precursor to all the feckless promiscuity that was to follow in the sixties.

   2001, Will Self, How the Dead Live, →ISBN, page 94

   Synonyms: bigmouthed, garrulous, loose-lipped, loquacious