Eminem Gym Share definition Flag (N.) A place where chocolate cover coated candies and Slim Shadys go to work out and flex up the glutes, and abdomens and such. We all had a rin-dindin at the Eminem Gym. Eminem Gym by G-Union May 21, 2003 0 0 Get merch Get the Eminem Gym mug. Buy Now — $32.95 See more merch