LeBron James is channeling his inner Donald Trump -- calling "fake news" on reports he wants to throw down with his teammate, Kyrie Irving.

It's been all over that LeBron is super pissed at Kyrie -- with some reports saying he's so unhappy that Irving wants a trade that, "LeBron James would be tempted to beat his ass."

Well, James has now broken his silence ... saying, "#NotFacts people! Boooo!!"

He added, "Get another source."

So, what's really going down with LeBron and Kyrie? Guess it depends on who ya wanna believe.