Conor McGregor on Donald Trump: “Shut His Big Fat Mouth,” Stop Mocking Ronda Rousey

Republican frontrunner Donald Trump is pretty much okay with saying whatever thought enters his brain—whether it be factual or not. But now, it looks as if his remarks could land him in trouble with UFC champ Connor McGregor, who warned the billionaire to "shut his big fat mouth" and stop mocking Ronda Rousey.

Trump comments came in the form of a tweet. The GOP leader noted that he was happy to see Rousey lose to Holly Holm.

TMZ caught up with McGregor outside LAX and asked him about Rousey's loss and his thoughts.

"Very tough fight," McGregor said. "Holly fought a great fight. I have much respect. This is the fight business, these things happen. Ronda will be back. True champions come back, and congratulations to Holly, the new champion."

And after spitting some serious knowledge on the gossip site – "defeat is the secret ingredient to success" – McGregor was asked about his thoughts regarding Trump's trash-talk of Rousey. "I didn't know Donald Trump was talking trash," he said, explaining that it's easy for someone outside of the octagon to say what they would do or what the fighter should have done.

The champ then gave Trump a couple words of wisdom:

"Donald can shut his big fat mouth. I don't give a f*ck about Donald Trump."

Check out the full video over at TMZ.

So, Donald Trump, your move – if you (or your Twitter fingers) have the guts, of course.