Michael Bentine in "It's a Square World" had a 'game' called Drats or Dratting and where, if you completely mucked it up, you were said to have 'nurdled'. Does sound a bit like your 'dratting and nurgin', but was completely imaginary.
Conger cuddling is a sort of human bar skittles involving team members standing on wooden blocks, flowerpots, chairs etc trying to dodge being struck by a noxious object on a rope and at the same time not falling off their perches. The noxious object doesn't have to be a conger eel, but it helps! Very similar to 'flonking the dwile'.