bigorexia
n.— «A member of the body dysmorphic disorders family, muscle dysmorphia is known by many names—barbell blues, bigorexia and megarexia are all commonly used to describe a condition referred to as “inverted anorexia nervosa.”» —“Dangers in weight of expectation” by Liam Rudden Evening News (Scotland) Nov. 5, 2001. (source: Double-Tongued Dictionary)