Presumably when you say "buliamarexia" you are referring to Bulimia and Anorexia
These are two common eating disorders and are not a single item.
Anorexia nervosa (anorexia) is commonly where the person suffering from this disorder does not eat.
Bulimia nervosa (bulimia) is commonly where the person suffering from this disorder overeats (eats a lot) and then purges themselves (makes themselves sick).