Slang...
 

If someone offers me a "chorus" in money terms how much is it....

Thanks.

made up slang i reckon. someone winding you up I think but what do I know, I'm not a cockernay. :D

I think its travellers speak....and I may have miss heard him????????

Limited chance of us knowing then fella.

You could spend 20 minutes looking through here http://www.peevish.co.uk/slang/index.htm

Did a search.....to no avail.

Thanks anyway.

You did miss hear him, it was a horse he was offering. :D

'Cor' is the Romany term for stealing. To go choring vehicles is in their vocabulary.

Maybe they were offering to lift it for you?

As above: I don't know under what circumstances you heard this but if you were trying to barter with someone & offered them less than they were willing to accept they could say 'are you trying to cor us?' i.e. are you trying to rob me.

Asking them to repeat themselves in English is surely the best course of action? ;)