spout off

English

Verb

spout off (third-person singular simple present spouts off, present participle spouting off, simple past and past participle spouted off)

1. (informal) To speak in a particularly boastful or arrogant manner.
2. (informal) To speak for a tedious or exasperating length of time.
3. (informal) To utter something in a brash, unwelcome, or unpleasant manner. (Can we add an example for this sense?)