I created my own drink for the show "Brimstone". It was called a "Flaming Sinner" and involved red-hots, cinnamon schnapps and vodka... and you drank it flaming. Burns in more than one place at once.
There was a Blake's 7 fan group that started in a bar and had a book of its own drink recipes. I only remember one offhand, called a "Tarrant's Toothpaste". It was white Creme de Menthe and cream. And according to the friend of mine who tried it, it really was like drinking liquified toothpaste. Not to my taste, and not hers, either.