babblemouth

One who babbles.

It’s a slow-dazzle performance that leaves you wishing the film would pair him up with Adams (a brief dalliance between them is inexplicably dropped) instead of sending his dancer wife, a neurotic babblemouth, back home to him.

He was a middle-aged babblemouth who talked computers and fad diets remorselessly, seasoning his monologues with plod monosyllables—Jung, Bach, Proust—managing to give them the intellectual weight of Ping-Pong balls.

One who reveals or gives away information.

Mr. Diefenbaker: Why, then, has the minister been such a babblemouth outside the House of Commons? Has he been instructed by the Prime Minister to keep his mouth shut from now on and endeavour to delude parliament into reaching the conclusion that what he has been babbling about he must not explain because he knows he would be in difficulty? / • (1442) / Mr. Blais: Mr.Speaker, outside the House I have provided exactly the same sort of information as I have given in the House—

“Have you mentioned these notions to anyone?” The Harper was insistent. / “Of course not, sir.” […] “I want to be certain of your discretion.” / “Menolly’ll tell you; I’m not a babblemouth.” He looked at Menolly for her support. / “Not normally, I’m sure. But you might be tempted to speak when taunted by others.”