Robert Jordan describes a character in his novel as follows:
His face was long and gaunt, with eyes so deeply set they seemed to look out from caves. There was no excess flesh on him, no fat at all; his skin was pulled tight over the muscle and bone beneath.
At other times is refred to as having “all of the fat boiled off of him”. I have often wondered what this would look like, but I have to wonder no longer.
This was on the back of a box of cereal I have, as you can see it is Dean Karnazes an Ultra Marathoner aka Byar, Child of the Light.