Potcheen is how I remember the spelling. It is spirit distilled from potatoes, and while you can make as much wine as you like, it is (as far as I know) illegal to distill spirits.

It also involves quite a bit of equipment, never used it myself, but I remember seeing pictures of lots of curly tubing - I think you have to heat the brew, the steam (and alcohol) goes up the tubes, then cools and drips down into a container.

Seems like a lot of bother to me. I do make homebrew wines, but never even thought about going in for spirits.