The problem with telling you what Nippy Nippy is is that then you'll never play it, or at least never be the victim, but it is the season of goodwill so: Firstly at least one person, the victim, mustn't know the game, nor should the victim know they are the victim. Everyone sits round in a circle with the Master of Ceremonies sitting next to the victim. The M.o.C reaches across to the victim and gently pinches the victim on a place on their face at the same time saying "Nippy Nippy". The victim must then reach across to the person next to them and gently pinch them on the same place whilst saying "Nippy Nippy". This is passed on round the circle until it reaches the M.o.C. who chooses a different place on the victim's face and round it all goes again. This continues until everyone has collapsed in hysterics or until the victim susses what's going on. The joke is that, after the first couple of rounds, and the victim is relaxed and used to the M.o.C's actions the M.o.C surreptiously dirties his pinching fingers with burnt cork, make-up or some other colouring and thus leaves two marks on the victims face each time he pinches it. The M.o.C. has to be pretty good at sleight of hand for it to work well. For the first few rounds the non-victims can liven up the proceedings by insisting that someone's got the pinch in the wrong place and making the pincher repeat the action until everyone is happy the correct place has been found, and neglecting to say "Nippy Nippy" also means the pincher has to repeat the action but once the burnt cork is in action such distractions should only be used sparingly, the object of such shenaningans is to relax the victim and make him/her concentrate more on other people rather than themself. I have seen the game played with two people with burnt corks and two victims (but only one M.o.C.) in which case each victim relaxes when they see the joke being played on someone else, so there's double the hilarity when the second victim finally realises they've also been had, this is often some time later, usually when they go to the loo, or pass by a mirror on the wall. Of course you could always have the first victim in on the joke.