
1) Act the rat 2) Babble 3) Babble out 4) Be a stoolie 5) Be a tell-all 6) Be indiscreet 7) Be loose-lipped 8) Betray a confidence 9) Betray secret 10) Bigmouth 11) Blab out 12) Blurt out 13) Blurt out the secret 14) Break 15) Bring out 16) Carelessly reveal secrets 17) Chatter indiscreetly 18) De-bag the cat
Found on
https://www.crosswordclues.com/clue/blab

1) Adonis 2) Blither 3) Giveitallaway 4) Gossip 5) Prate 6) Sing 7) Sing like a canary 8) Spill the beans 9) Talk 10) Tattle 11) Tell 12) Tell-all 13) Yak
Found on
https://www.crosswordclues.com/clue/blab

• (v. i.) To talk thoughtlessly or without discretion; to tattle; to tell tales. • (n.) One who blabs; a babbler; a telltale. • (v.) To utter or tell unnecessarily, or in a thoughtless manner; to publish (secrets or trifles) without reserve or discretion.
Found on
http://thinkexist.com/dictionary/meaning/blab/

Biomedical Library Acquisitions Bulletin
Found on
http://www.encyclo.co.uk/local/20895

To utter or tell unnecessarily, or in a thoughtless manner; to publish (secrets or trifles) without reserve or discretion. 'And yonder a vile physician blabbing The case of his patient.' (Tennyson) ... Origin: Cf. OE. Blaberen, or Dan. Blabbre, G. Plappern, Gael. Blabaran a stammerer; prob. Of imitative origin. Cf. Also Blubber, v. ... Source: Webs...
Found on
http://www.encyclo.co.uk/local/20973
Blab intransitive verb To talk thoughtlessly or without discretion; to tattle; to tell tales. « She must burst or
blab .
Dryden. »
Found on
http://www.encyclo.co.uk/webster/B/59
Blab noun [ Middle English
blabbe .] One who blabs; a babbler; a telltale. 'Avoided as a
blab .'
Milton. « For who will open himself to a
blab or a babbler.
Bacon. »
Found on
http://www.encyclo.co.uk/webster/B/59
Blab transitive verb [
imperfect & past participle Blabbed ;
present participle & verbal noun Blabbing .] [ Confer Middle English
blaberen , or Danish
blabbre , German
plappern , Gael.
blabaran a stammerer; p...
Found on
http://www.encyclo.co.uk/webster/B/59

Blab is slang for to talk about someone, to tell tales, to inform on.
Found on
http://www.probertencyclopaedia.com/browse/ZB.HTM
No exact match found.