Riff Raff -- I'm Giving Up Cocaine and Molly ... But Not Weed

I'm Giving Up Cocaine and Molly

... But Not Weed

EXCLUSIVE

Riff Raff has been touting his cocaine and molly addictions for 4 years ... but now, the rapper tells us he's giving up both FOR GOOD -- even though he'll continue puffing sticky icky.

The "Kokayne" rapper says he decided to get sober a few months ago ... after he got so wasted the night before a celebrity basketball game for charity he couldn't play.

Riff Raff says that's when he realized he had a bad cocaine problem and had to turn his life around.

The 32-year-old says he isn't going into treatment ... he says fitness is the solution: "Whenever I have the urge to do coke or molly, I just pick up weights instead."

He's been sober a few months -- except for weed smoking -- and Raff says he feels great.

Plus, he's gained 40 pounds ... and is looking swole again.