Haven;t heard it refered as cannibutter. But pot butter is basically... You boil lots of butter, like at least a pound, and when it melts and starts to boil, throw in the marijuana. (As much as you want. Them more you use, the more potent.) ann the you use cheese cloth the filter out the marijuana. The fat in butter absorbs THC. There's no use for the marijuana after that.
you smoke it between 2 hot knives or ive seen a bong made for smokin it, hard to explain but very worth a look into makin it
its got very high levels of thc in it so you dont need much to put you on your arse