Daniel Cormier says Jon Jones' good guy image is all BS -- claiming Jon privately called him the "biggest p***y he ever met" and told him to "suck his d***."
It all went down at a UFC media event in Vegas -- with DC saying that Jon is a fraud ... and hasn't learned a damn thing from all of his issues outside of the Octagon.
Jon took exception and they went off on each other ... insane.
The two will settle it in the cage at UFC 197 next month.
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