That's just part of the fiery statement the boxing legend issued in response to Dana White calling him an irresponsible "cokehead" for allowing Chuck Liddell to fight last weekend.

Remember, White was PISSED -- claiming Oscar cared more about money than Liddell's health and said all sorts of terrible things about De La Hoya.

Now, Oscar has responded ... saying, "Dana is so small and threatened by our success with DAZN and now in MMA that he is bringing up news from a decade ago to try to stay relevant."

"Boxing has entirely rejected him. And, MMA fighters are now realizing they don’t have to risk their lives just so he can get rich."

"Golden Boy and I are moving forward and are bigger than ever. Dana should shut the f*ck up and try to figure out how to save his own company."

The comment about DAZN is in reference to the $365 MILLION deal Oscar put together for Canelo Alvarez as part of a 5-year, 11 fight contract.

These guys clearly hate each other's guts -- and we're guessing this feud is far from over.