
Be on about something
Persistent Topic
When someone constantly talks about the same subject, they're 'on about' it.
Are you still on about moving to Canada?
Potential Annoyance
This phrase can imply that the speaker finds the topic repetitive or irritating.
You've been on about that band for hours!
Strong Interest
Indicates the person has a deep interest in the topic.
He's always on about environmental issues.