gym buff 

a person who's addicted to the gym

roxy gambino is such a gym buff

gym buff by unicornprincess6901 August 2, 2017

Gym buff 

A man who is completely lost in life after gettingbout of the security of high school, and has no idea how to define himself or fund meaning in life other than repeatedly lifting weights and taking steroids to get as enormous and humanly possible. They usually base their entire lives aroubd this only wearing clothes that either show off their deformed bodies or say things like "seriously strong"

Tom: How's Tony been doing John
John: Not too well. Poor guy never had any idea what to do with himself, so he's just become a total gym buff. Never does anything but pump iron and dope up until he looks like a human terd.

Gym buff by the funny one November 4, 2018

Gym Me Buff It 

A guy who spends every spare moment in the gym.

I went over to my ex-girlfriend's house to see if we could patch things up. But, she already had another dude over there, some "Gym Me Buff It" guy.

Gym Me Buff It by Jimmy "all you can eat" Buffet January 1, 2007