bu·lim·ia
noun \bü-ˈlē-mē-ə, byü-, -ˈli-\
Definition of BULIMIA
1: an abnormal and constant craving for food
2: a serious eating disorder that occurs chiefly in females, is characterized by compulsive overeating usually followed by self-induced vomiting or laxative or diuretic abuse, and is often accompanied by guilt and depression —called also bulimia nervosa
Bulimia often goes unnoticed because a person can have bulimia but still maintain their normal weight, unlike anorexia.
I like how you mentioned that bulimia goes unnoticed because people affected often manage an average weight. Many people suffer from bulimia for years because of this reason which create health problems that constantly build up.