The often over inflated self confidence that accompanies going to the gym regularly. Were someone to be overly confident about their actual size or disillusioned as to their stature as a result of doing excercise, to the point of arrogance, then they would have an gymflated ego.
Bro 1: Hey brah, why is that weedy guy wearing a wife beater??
Bro 2: Well ever since he started going to the gym loads he thinks he's hench. Weird right??
Bro 1:yeah well, that guy has an Gymflated Ego .