Although it's not one of the best episodes, the Flaming Moe is nevertheless a well-known drink in Simpsons lore, as is Skittlebrau.
Another drink - if you can call it that - is a single plum, floating in perfume and served in a man's hat. While the last one is clearly a nod to Yoko Ono's general batshit ideas about postmodernism, the other two could actually work as real-life drinks.
So, how do they actually taste? According to YouTube channel Cocktail Chemistry, not very well at all. So bad, in fact, that one of them tasted awful, the other not so bad and the other was clearly a joke.
Take a look.