Naughty step, Mort.
A slap "upside the head" was nonetheless a new one on me too. You learn something new every day here although, tantalisingly, Mr Google doesn't provide
precise information about the action involved. I intend to interpret as one of those upward cuffs to the back of the head that Mr "Connie" Francis, one of our history teachers used to dish out, probably illegally.
I was going to mention the 'Glasgow Kiss' but in the interests of Anglo-Caledonian relations perhaps I'll desist. I wouldn't want to earn a St Albans Stinger.