UFC Honcho Dana White Trashes MMA Legend

MMA legend Fedor Emelianenko ... SUCKS ... and he SUCKS HARD ... this according to UFC president Dana White.

White and Fedor have been at each other's throats for months ... a feud which reportedly began after the legendary Russian fighter -- who many claim to be the greatest mixed martial artist who ever lived -- refused to sign a deal to fight in the UFC.

Fedor's manager reignited the war just last month ... when he compared White to a greedy "dog" who runs the UFC like a prison.

But White fired back last night on his way out of Mastro's in L.A. -- telling photogs, "Fedor sucks man ... you guys need to get with the facts, deal with it ... he sucks. Get over the Fedor thing."