Definition of "blab"

blab

/blæb/

verb
third-person singular simple present blabs, present participle blabbing, simple past and past participle blabbed
1. (transitive, intransitive) To tell tales; to gossip without reserve or discretion.
  Quotations
  And yonder a vile physician blabbing / The case of his patient.
  1855, Alfred Tennyson, “(please specify the page number(s))”, in Maud, and Other Poems, London: Edward Moxon, […]
  Helga Blabs It All.
  1998, "Helga Blabs It All", TV episode in season 3 of Hey Arnold!, animated television series created by Craig Bartlett
2. to speak carelessly or excessively
noun
countable and uncountable, plural blabs
1. (countable) One who blabs; a babbler; a telltale; a gossip or gossiper.
  Quotations
  "You'd better have shoved your grey snout in a hornets' nest, Badger, than suggest that I am the blab," said Nikabrik.
  1951, C. S. Lewis, Prince Caspian: The Return to Narnia
2. (uncountable) Gossip; prattle.
  Quotations
  Audie never liked him because he was further in with old Craig than he was, bragging and blowing about his work and the things he could do, while Audie sat quiet as a mouse listening to his blab.
  1976, David Toulmin, Blown Seed, page 148