eating disorder

mental disease that is characterized by an irregular and health threatening eating habit (i.e. anorexia, bulimia, compulsive eating)

An eating disorder is a complex compulsion to eat, or not eat, in a way which disturbs physical and mental health. The eating may be excessive (compulsive over-eating); too limited (restricting); may include normal eating punctuated with episodes of purging; may include cycles of binging and purging; or may encompass the ingesting of non-foods. The most heard about eating disorders are Anorexia nervosa and Bulimia nervosa. The most widely and rapidly spreading eating disorder is compulsive overeating or Binge eating disorder. These are also the three most common eating disorders. All three have severe immediate and long-term health and can cause death. There are numerous theories as to the causes and mechanisms leading to eating disorders.
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Eat·ing disorder n. Any of several patterns of severely disturbed eating behavior, especially anorexia nervosa and bulimia, seen mainly in female [more]Eating disorder - Community and Resources

Noun
1. a disorder of the normal eating routine
(hypernym) disorder, upset
(hyponym) anorexia

Obesity or any of a category of ailments characterized by psychological and physiological problems related to food intake and defined in the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders (DSM). DSM-defined eating disorders comprise anorexia nervosa, bulimia nervosa, binge-eating disorder, specific variations of these disorders, and specific habits related to them.