WARNING: THIS GAME INCLUDES STRONG LANGUAGE!
I first found a description of this game on the Internet back in the 90's, but didn't start playing it regularly until 2018. Since then, we've made several revisions to the rules, mostly to clarify ambiguities. We also added three new cards to the game to make it more fun. The rules are six pages long and we are constantly referring to them, even though we've been playing it for over two years.
I don't think you can purchase this game anywhere, but you can make your own deck by starting with two decks of ordinary Uno cards (we prefer the "Classic" style, which has words, to the newer style which does not) and modifying certain cards to create the new ones (the Swinger, the Swapper, and the Condom). The instructions (see below) has pictures of all of the special cards and says how many of each one there are (the Qty column).
Download the rules