Definition of "blab" in English

verb

1. (ambitransitive) To tell tales; to gossip without reserve or discretion.

   • 1998, "Helga Blabs It All", TV episode in season 3 of Hey Arnold!, animated television series created by Craig Bartlett Helga Blabs It All.

2. to speak carelessly or excessively

noun

1. (countable) One who blabs; a babbler; a telltale; a gossip or gossiper.

2. (uncountable) Gossip; prattle.