Definition of "blatter"

blatter¹

noun
countable and uncountable, plural blatters
1. Blather; foolish talk.
2. A sound of rapid motion.
verb
third-person singular simple present blatters, present participle blattering, simple past and past participle blattered
1. (intransitive) To blather.
2. (intransitive) To hurry or rush noisily.

blatter²

noun
uncountable
1. A hard battering of rain.
  Quotations
  Between the roar of the thunder and the blatter of the rain there were intervals of an astounding still, of an ominous suspense […]
  1901, Good Words, volume 42, page 7
  Rain type 17 was a dirty blatter battering against his windscreen so hard that it didn't make much odds whether he had his wipers on or off.
  1984, Douglas Adams, So Long, and Thanks for All the Fish (The Hitchhiker's Guide to the Galaxy)