With no equipment to measure the chemical components, or even ABV%... This stuff can be (and sadly often is) lethal.
But I've been asked about it often enough so I'll concede...
It's a concept as old as incarceration itself - as long as people have been locked up, they've wanted a way to get liquored up. Pruno, Pochi, Prison juice, Prison Claret, Raisin Jacks, Doin' time Moonshine... However you wish to put it. People have managed to get smashed in Jail, all you need is a few ingredients and the knowledge to put it together to evolve into something ungodly.
Tastes like freedom...
The basics of booze creation are fairly simple...
Yeast + Sugar = Alcohol and Co2
This is normally done with harvested grains, grapes, fruits, carefully selected yeasts and sugars, hops flavourings, fancy filtration methods, chemical stabilisation and constant evaluation as to how the finished product is coming along... But in this instance, imagine you're in lock-up for the next 20 or so years for whatever the hell you did, With a bin bag, ketchup, and a dream.
The basics:
A bin bag (or an equivalent airtight bag)
Somewhere dark, warm, and safe from guards.
The Ingredients:
Fruit, most recipes start with oranges, peeled. About 8 mid size.
Can of fruit cocktail (or any tinned fruit, the sugar and syrup is what you're after)
200g Sugar
A cup of Ketchup
Water
You may add a slice of bread, some believe the yeast contained is required and some say it makes it taste even worse. Up to you!
The Method
Combine your choice of fruit with the fruit cocktail, by "combine" I mean put it in the bin bag and smash it up. Add a mug of water. You may wish to use a sock to filter the pulp and keep the liquid clear, you classy thing you.
Make it warm, keep it by the radiator, run the bag under hot water, draw a face on it and cuddle it... whatever, you need to keep it warm and safe until the bag swells. Think of it as your own "Wilson"
Leave Wilson for 48 hours.
At this point, you want to open the bag, ideally with a towel over your face, it will stink. Add your sugar and ketchup (and bread if you like the toasted brioche notes) Stick it next to a radiator. Say goodbye once again to Wilson. Do with your time what you will.
Over the next couple days, keep an eye out. If the bag looks like it wants to explode, let out a little bit of the gas.
In about a week, you will have a ballooning bag of hell-gas. You will want to strain out the liquid, mould, and bread using a towel or sock, whatever you have available.
If you happen to have it available, add a crumbled up Vitamin C tablet
This isn't too alien a concept for prisons as they've been known in the US to seriously limit the amount of fresh fruit available purely to curb Pruno production, so prisoners were supplemented with Vit C to keep away scurvy. Vitamin C should stop the fermentation process so you can bottle your creation.
And Godspeed to you. The hangover is supposed to be hell on earth
Fundamentally people are creative things, most are born survivors and when imprisoned will find ways to make life bearable. The recipes available are almost exclusively from one country. You'd think this would have to be the kind of nation to imprison a huge proportion of its population to get so many variances and names for one thing. Maybe its some kind of impoverished hell hole bent on making sure it has more prisoners than any other nation on earth. Maybe its the world of RoboCop?