Top Definition
Some one who has no room for anything in life except the gym. They live, sleep and breathe the gym making them unbearable to have a conversation with.

They are so 2 dimensional that they will always try to steer the conversation towards fitness because they know nothing else.

These are different to Gym enthusiastic who will par-take in lots of different exercises outside the gym such as rock climbing or swimming.
"Today I bench 150kg and squatted 200kg, and oh man the funny part was the ladies, man you should have seen this. The ladies clearly didn't want there boyfriends no more. Why would they when they can have me? "

"No one likes a gymdamentalist. Don't be a douche!"
by littlemissbrave October 15, 2012

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