Top Definition
The extremely hot and ample chested females in a gym that wear pink tops and do squats, behind the neck pulldowns, military shoulder press, butterflies, etc. and cause men to not work out. If she is on the machine near the water fountain, then all the men will go home well-hydrated to their fat ugly wives. Frequently they will have a boyfriend with them with biceps larger than your thighs.
-Hey man, how did your workout go?
-Ahhh, I didn't get anything done...
-Why not? Too crowded?
-No...
-Gym Kryptonite?
-You know it... Now if you'll excuse me I have to go to the bathroom.
by Kozar May 05, 2005
5 Words related to Gym Kryptonite

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