Top Definition
The act of making continuous eye contact with a person at the gym and both persons simultaneously work harder until reaching a peak of workout intensity.
Me and this really hot trainer totally had gym sex this morning!
by Mocha Face October 02, 2010
When you use your sweat from a workout as lube
Dude, I had some slimy moist gym sex with that girl.
by just a bro helping a bro June 15, 2016
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