blab

Blab \Blab\, v. i.
   To talk thoughtlessly or without discretion; to tattle; to
   tell tales.
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         She must burst or blab.                  --Dryden.
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Blab \Blab\, n. [OE. blabbe.]
   One who blabs; a babbler; a telltale. "Avoided as a blab."
   --Milton.
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         For who will open himself to a blab or a babbler.
                                                  --Bacon.
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Blab \Blab\ (bl[a^]b), v. t. [imp. & p. p. Blabbed (bl[a^]bd);
   p. pr. & vb. n. Blabbing.] [Cf. OE. blaberen, or Dan.
   blabbre, G. plappern, Gael. blabaran a stammerer; prob. of
   imitative origin. Cf. also Blubber, v.]
   To utter or tell unnecessarily, or in a thoughtless manner;
   to publish (secrets or trifles) without reserve or
   discretion; -- sometimes used with out. --Udall.
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         And yonder a vile physician blabbing
         The case of his patient.                 --Tennyson.
   [1913 Webster]See also:
Blabbed Blabbing Blubber