The act of attaching an almost completely used piece of soap to a new, unused piece because it is now too small to be conveniently used but you also don't want to waste it.
My mum always soap grafts because she doesn't want to waste anything. Soap grafting is good.
The term "Graffing Out" refers to the act of having a few screws lose or to be mentally unstable, commonly used in Dominos for some employees having problems.