"Hot cockles" was a popular game at Christmas in medieval times. It was a game in which the other players took turns striking the blindfolded player, who had to guess the name of the person delivering each blow. "Hot cockles" was still a Christmas pastime until the Victorian era.
I was looking up some Christmas cookie recipes online and ran across this. It just...makes me laugh. I guess if you are a feuding family at Christmas, this is a good way to let off some steam!