It's someone who helps another person who has an eating disorder, to lose weight. They are fetishists most of the time, and will act predatory toward and fetishize girls with an eating disorder.
The name of someone who should be more confident in themselves because they are more attractive, smart, fun, and/or talented than they give themselves credit for.
"C'mon, Ana-Lynn, you've got real skill! You just need to realize that!"