i don't know which suggestion of Rusty you are referring to but i still think my guess is worth looking into.
here's a clip from the link i posted;
"One poem that people said when mumming was:
Christmas is coming, the beef is getting fat,
Please drop a penny in the old mans hat.
Over the years, this was changed into a very similar poem that is said by some carol singers today:
Christmas is coming, the goose is getting fat,
Please put a penny in the old mans hat.
The early settlers from the UK took the custom of Mumming to Canada. It is known as Murmuring in Canada, but is banned in most places because people used it as an excuse for begging.
Mumming is still done in parts of the UK, USA and Canada."