bluster

Concise Oxford English Dictionary © 2008 Oxford University Press:
bluster/ˈblʌstə(r)/

▶verb

• 1 talk in a loud, aggressive, or indignant way with little effect.

• 2 (of wind or rain) blow or beat fiercely and noisily.

▶noun blustering talk.

– derivatives
blusterer noun,
blustery adjective.

– origin ME: ult. imitative.