blab

[blab]Informal.
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verb (used without object), blabbed, blab·bing.
  1. to talk or chatter indiscreetly or thoughtlessly: Don't confide in him, because he blabs. She blabbed so much I couldn't hear the concert.
noun
  1. idle, indiscreet chattering.
  2. a person who blabs; blabbermouth.
Also blab·ber [blab-er] /ˈblæb ər/.

Origin of blab

1325–75; Middle English blabbe (noun), perhaps back formation from blaberen to blabber; cognate with Old Norse blabbra, German plappern
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for blab

blab

verb blabs, blabbing or blabbed
  1. to divulge (secrets) indiscreetly
  2. (intr) to chatter thoughtlessly; prattle
noun
  1. a less common word for blabber (def. 1), blabber (def. 2)
Derived Formsblabbing, noun, adjective

Word Origin for blab

C14: of Germanic origin; compare Old High German blabbizōn, Icelandic blabbra
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for blab
v.

mid-15c., apparently from Middle English noun blabbe "one who does not control his tongue" (late 13c.), probably echoic. Related: Blabbed; blabbing. The exact relationship between the blabs and blabber is difficult to determine. The noun was "[e]xceedingly common in 16th and 17th c.; unusual in literature since c 1750" [OED].

Online Etymology Dictionary, © 2010 Douglas Harper