Как по Английски будет болтать о

phrase

Exactly right.

Примеры использования:

The programme is bang on about the fashion world

phrasal verb

Talk at tedious length about something.

Примеры использования:

The government banged on about competition and the free market

phrasal verb

To spend your time doing a lot of things that are not important instead of the thing that you should be doing

Примеры использования:

I wish you'd stop faffing about and do something useful!

phrasal verb

To express your opinions too loudly and publicly

Примеры использования:

I had to listen to michael mouthing off about the government all through lunch.