Slim Jxmmi is making the transition from music to boxing -- he's preparing for his first match, and already looking to get in the ring with a bunch of famous opponents.
We got the Rae Sremmurd rapper after he finished a training session at Dogpound Gym in WeHo, where a ton of celebs work out, and asked why he's getting into boxing.
Slim says he's turning 30 and wants to make some changes, set a good example for his kids, and as he put it to our photog, "Be done with the stupid s***.