I have to say getting called "thick" or "voluptuous" can be really annoying at times coming from men that think anything over 100 pounds on a woman is fat. Through college I was about 130-140 pounds or so and I got those words thrown at me as really meaning "too fat." I'm about 5'9" to be honest I have the shoulders of a linebacker. I will never, ever, ever look like a supermodel. My body isn't made that way. So many times I've heard those words used as insults.
However, I wish there was a word that described a woman that is larger than average but sexy that isn't a euphemism for "fat." It seems like our culture (US) is more and more intolerant of any body type on a woman that is anything but incredibly thin. Therefore, words like voluptuous have gotten bad connotations. This is unfortunate since beautiful women come in all shapes and sizes.
At this point, if someone calls me voluptuous, I take it as a compliment-- but only because it's better than "that fat lady." My weight has been a mess in the last few years because of some health problems and just general life insanity. I really appreciate it when someone even tries to look beyond the fact that I'm not a size 0 (or even a size 10) and see something other than fat.
I have to echo the other folks that said not to call someone with an eating disorder anything size related. Anything you say will just feed into the eating disorder. A lot of times when someone asks those questions, they are looking for an answer to justify their behavior, and at that point, any answer can justify it. If you say "voluptuous," it means they need to continue their destructive behavior because they are awful and fat, and if you say "thin" it means they can continue their behavior because it's working.
