Reading the beginning of one of Vinny's links, I found this:
I am constantly mortified by my fellow Scots' insistence on eating porridge with their fingers and forgetting to crumb down after the macaroni pies have been served, before combing an ox at the dinner table.
Instead of putting it on SiT, I'll stay here and ask Tony for a translation of "crumb down" and "combing an ox".
