This is the Scottish term for the last day of the year, celebrated up and down the country with much revelry and of course booze. When I was a teenager I absolutely hated it. We were inundated by drunk people that we had never clapped eyes on before. The most memorable being the man who fell asleep and dropped his false teeth on the carpet!
However, I have now grown up (usually), and within my own, or friends houses have decided that I quite like it. The booze of course still flows but in a more controlled sort of a way and we can bring in the New Year with friends or family.
Wishing you all a very happy and health New Year
Slant-mhath ( good health)