Gym buddy 

A gym buddy is a fuck buddy or your partner in your FWB relationship. A fuck buddy is an amazing way to release stress and endorphins.

Telling your friends your going to go hang out with your gym buddy and going and fucking till norning

Gym buddy by Relationship advice 828 January 29, 2017

Gym Buddy 

What a gay man calls his gay lover in his 'subtle' way of coming out to his already 'suspicious' straight friends. "Room mate" is also used sometimes.

Not sure if my friend & neighbor Sean is gay but some mornings I see him & his "gym buddy" Fred walking around the house in matching monogrammed robes..

Gym Buddy by catfight12 January 9, 2009