Read online about celebrity's kid with bulimia. Sounded serious. What is it?

Bulimia is an eating. Disorder characterized by an obsession with body shape and image which involves alternately overeating with various attempts to not gain weight such as self induced vomiting or laxative abuse. And yes, it is very serious with wide ranging physical consequences.
Bulimia ?? Biulimia is an acquired disorder of eating.It is composed of starving binging and/or over exercise and vomiting-purging/and laxative abuse in order to achieve resolution of the "overeating"to fix the "bad" behavior. The patient who is bulimic feels shamed to be not in "control" of herself. Because they are often "perfect" kids they feel overewhelmed and it is difficult for them fo ask for help.