Kenyon Martin is UNLOADING on his former Denver Nuggets coach George Karl -- saying the guy is a "terrible person," "awful coach" and a "coward."
Martin is clearly furious with Carl over a new tell-all book the coach is about to drop -- in which Karl rips Kenyon as a "spoiled brat" and Carmelo Anthony as a famewhore and a "user of people."
Martin's immediate reaction -- "The Nerve of an AWFUL AND COWARD ASS COACH."
He continued, "Everyone that's played for that awful person and coach can't stand the ground he walks on."
"I didn't have a father going up. We all know that. What's George Karl excuse for being a terrible person."
There's more ...
"Since we were so bad as players. Tell him to forfeit those Denver wins. Having a lot of wins doesn't make you a good coach. He was blessed with great talent."
We're guessing this ain't done yet. Stay tuned ...
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