Vile Bodies by Evelyn Waugh has this to say about kippers:
Adam ate some breakfast. No kipper, he reflected, is ever as good as it smells; how this too earthly contact with flesh and bone spoiled the first happy exhilaration; if only one could live, as Jehovah was said to have done, on the savour of burnt offerings.
Now, if you want to make a great smell for your deity what you need is burnt bone, and apparently (I've never sacrificed anyone myself) the best bone to do this with is the os sacrum, the sacred bone. It's at the bottom of your spine and the Romans believed that it was the part that the gods really liked. That's why it's called the sacrum to this very day.
If you have a pain in your sacrum, it's called sacralgia. What I like about this is that, etymologically, sacralgia means sacred pain, but really it means a right pain in the arse. But if you told somebody that they were being a sacralgia, they would never realise.
This makes sacralgia a very useful word.
The Inky Fool regrets his choice of restaurant.