gainer hater
A person who gives the gym and its members the finger. They think they're the only one who matters.
The gainer hater texted me and said, 'You're just a meathead who needs more sleep.'
At the gym, the gainer hater yelled, 'I don't need no protein shake, I need no protein.'
My mom is a gainer hater. She says she's too busy watching TV to lift weights.