Nothing to do with fish food, and long before computer game consuls, Hot Cockles was a popular Christmas game in which one player would be blindfolded, the other players then taking it in turns to strike the poor unfortunate.
Assuming the strike wasn’t fatal, the struck person would then have to guess the name of the person who delivered the blow.
It’s funny what passed for entertainment in medieval times.
Everything you always wanted to know about Christmas but were afraid to ask, complete with over 500 illustrations. The Completely Useless Guide to Christmas, released today on Amazon.com.