TMZ Sports talked to 34-year-old Covington, the #1 ranked welterweight fighter, ahead of his "blood feud" with 37-year-old Masvidal, the #6 ranked WW, at UFC 272 on March 4.

"This is a blood feud. This goes back to a brotherhood. We were eight years together every single day, side by side, couldn't leave each other -- best friends," Chaos told us.

"Now, we're the biggest bitter enemies. He's the one person on Earth that I don't give a s***. Anytime I see him, I want to send that guy straight to hell and luckily I get to do it in the UFC Octagon next Saturday night on Pay-Per-View and it's gonna be bad, man. I'm gonna make him pay. I'm gonna make him suffer for backstabbing me."

See ... this goes beyond the routine pre-fight trash talk.

Colby and Jorge were friends ... best friends. Unfortunately, the relationship fell apart (long story) ... and now the men are about to be locked in a steel cage together.

One of the things both guys have in common is a friendship with Donald Trump.

So, who's the former Commander-In-Chief rooting for?! We asked Colby.

"Mr. President, #45, is not torn. He knows where his loyalty stands. He knows the person that put his whole platform for him, that was sacrificing, doing everything, really showing that I'm a true supporter. George is a fake supporter. He's not a real supporter."

Then, Covington added ... "Donald Trump, you know, I talked to his family the other day, I know where his loyalty resides."

Speaking of Trump, we also asked CC whether the ex-prez would be attending the fight.

Remember, DT attended UFC 264 in July 2021 -- Conor McGregor vs. Dustin Poirier 3 -- where he dapped up Masvidal backstage.