In reply to:

"Chuntering" or "chundering" (as I've heard it pronounced) means going on endlessly about something extremely trivial or boring in usage here in Godzone. I haven't heard it for years, though. To "chunder" also means to vomit, so it's probably a misuse of the word in relation to "chunter", although since "chunter" could also be referred to as "verbal diarrhoea", maybe there is a relationship after all?

I was reminded today by a wwftd correspondent of the following from Men at Work:

Do you come from a land down under?
Where rivers flow and men chunder?
Can you hear it, can you hear the thunder?
You better run, you better take cover.

conventional wisdom here in the U.S. is that they meant 'to vomit'; perhaps conventional wisdom is wrong?