BLAB Meaning of BLAB in English v. & n. --v. (blabbed, blabbing) 1. intr. a talk foolishly or indiscreetly. b reveal secrets. 2 tr. reveal (a secret etc.) by indiscreet talk. --n. a person who blabs. Etymology: ME prob. f. Gmc Oxford English vocab. Оксфордский английский словарь. 2012