To chunter is to talk for a long time, usually in a low, muttering way, about something that is not very interesting — a small complaint, a worry, a story with no end. British informal. People often say chunter on or chunter away. It can feel more like grumbling than like a real conversation, though it is milder than a row. You will hear it in the UK; it is rare in American English, where drone on or mutter is more likely. It is not a compliment, but it is not a very sharp insult either — more ‘oh, there they go again.’

碎碎念、唸個沒完（偏英式）