During or After a workout. A person with Gym Brain tends to forget words & act completely stupid.
I can’t think I got Gym Brain”
by pixelhuntr February 24, 2022
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The glazed over inhibition-free state of mind achieved during and after a good workout.
Man 1: where was jim?

Man 2: He was at the gym, look in his eyes. he's got that gym brain.
by sinister9695 May 6, 2014
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