Definitions by BijomaruMogami

Gymnesia 

A habitual or compulsive involvement in physical exercise in a gym or fitness centre that leads to the detriment of other aspects of the individual's day to day life.

I haven't seen Billy for a while. Where's he got to?
That guy's got a bad case of Gymnesia!

Gymnesia by BijomaruMogami September 1, 2017