In bodybuilding that's sometimes called the 'look of death'. It's what you see when a bodybuilder gets down to like 3-4% bodyfat and dehydrates them self so you can see all the striations The worst I can remember was James Irvin @185, but Conor @145 is right up there.
Irvin:
A good example of a bodybuilder with the death look:
The sunken in cheeks are a hallmark of massive fat and water loss. The fat pads in a person's cheeks are one of the last places the body will lose fat from, along with glutes, the last bit around the midsection, and the pads in the hands and feet. I've heard of bodybuilders saying that it's painful for them to stand on stage because the weight cut means they have less padding under their feet than normal.