Webster's Revised Unabridged Dictionary · 1913

Blat

Blat ({not transcribed}) , intransitive verb

To cry, as a calf or sheep; to bleat; to make a senseless noise; to talk inconsiderately. [Low]

Blat , transitive verb

To utter inconsiderately. [Low]
If I have anything on my mind, I have to blat it right out. — W. D. Howells