Gymface 

The look of absolute focus and determination. No matter what you do in life you always have your GYMFACE on! It's an attitude - a way of life. It’s a revolution. It's the will to always train and stay 100% focused.

Show Me Your... Gymface!

Gymface by Gymface October 5, 2013

Gym Face

When strangers look at each other at the gym and attempt to remain expressionless because they are either checking the other person out or don't want to invite conversation. The former usually applies to men while the latter usually applies to women.

I know he was checking me out, but he was trying to put on his gym face.

Gym Face by shakeabon May 13, 2010

Gumface 

Someone who is being dumb or stupid or just acting crazy

You're such a gumface

Gumface by KIX_01 November 2, 2019

resting gym face 

When you’re at the gym and a douche bag approaches you wanting tips on his form. You just hit him with the resting gym face and crush his soul.

That loser Jared tried to talk to me at the gym again....but I hit him with the resting gym face and he retreated immediately.

resting gym face by Resting gym face January 3, 2018