I don't know if you've been following the news lately (I haven't), but I was grabbed by a story that ran nationwide last Friday. The story (found here)
Using MRIs, a group of doctors discovered that many individuals with normal body mass index scores were still living with unhealthy amounts of internal fat. Without exercise, even careful dieters can still stockpiling the fat internally. As Dr. Jimmy Bell says in the article, "Being thin doesn't automatically mean you're not fat."
Of course, the good news is that, scientifically-speaking, now anyone is fair game to be called fatty or lard-bucket. I mean, that's pretty cool.