Blab

Part of speech: noun (n.)

One who blabs; a babbler; a telltale. "Avoided as a blab." Milton. For who will open himself to a blab or a babbler. Bacon.

Part of speech: verb (v.)

To utter or tell unnecessarily, or in a thoughtless manner; to publish (secrets or trifles) without reserve or discretion. Udall. And yonder a vile physician blabbing The case of his patient. Tennyson.

Part of speech: verb (v.)

To talk thoughtlessly or without discretion; to tattle; to tell tales. She must burst or blab. Dryden.