[blab] n [ME blabbe; akin to ME blaberen] (14c) 1 archaic: one that blabs: tattletale
2: idle or excessive talk: chatter -- blab.by adj
[2]blab vb blabbed ; blab.bing vi (15c) 1: to talk idly or thoughtlessly: prattle
2: to reveal a secret esp. by indiscreet chatter ~ vt: to reveal esp. without reserve or discretion "blabbed the whole affair to the press"