Conor McGregor went scorched-earth on Twitter as he flamed 3 UFC rivals and Jake Paul

• Conor McGregor watched the chaotic UFC 261 event unfold from afar.
• He tweeted sympathy over the way Chris Weidman broke his leg, but quickly spat fire at his rivals.
• "It's time to really start caving heads in properly with these hammers of mine," he said.

Conor McGregor activated scorched-earth mode on Twitter as he flamed three of his UFC rivals, as well as internet sensation Jake Paul.

The former two-weight UFC champion was watching Saturday's UFC 261 event in Florida unfold from afar. The elite MMA show featured knockouts, new champions, and a "F--- Jake Paul" chant from a hostile, sell-out crowd.

After Chris Weidman snapped his leg when his opponent Uriah Hall checked a kick of his, McGregor offered sympathy online.

"Hoping Chris Weidman has full recovery! Never nice to see," McGregor said. "Crazy is the calf kick."

But hours later, the Irishman's tone changed, and he started calling out rivals and mocking fellow MMA fighters.

He called his fellow UFC lightweight Justin Gaethje a "dweeb," as well as "gack eye," and "el cockeye."

He previously slammed everything YouTube creator Jake Paul was attempting to do in pro boxing.

And he even turned on UFC welterweight champion Kamaru Usman, who retained his title with a thumping knockout win over Jorge Masvidal.

McGregor indicated he'd be campaign at 170-pounds after finishing a run at the lightweight limit of 155-pounds this year, targeting Usman's title.

Fresh off his highlight-reel win, Usman responded by saying the difference between them is that he finishes people, whereas McGregor - who has lost four of his last seven bouts in all competitions - is the one who gets finished.

McGregor called Usman "carbuncles," commented on his "spotty back," and then said many in the UFC are nothing but "f------ bums."

"F--- these juice heads anyway, I don't give a bollox," said McGregor, in a final tweet.

"I'm just calling it as it is. I've the biggest balls in Ireland with two lump hammers attached to me elbows. Send me in and I'll pop that big pimple. Get three belts to go with my three commas."

McGregor, who said the full crowd at UFC 261 had gotten him excited, returns to the Octagon for UFC 264 which takes place July 10 at the T-Mobile Arena in Las Vegas.

The 32-year-old fights Dustin Poirier in a trilogy bout. Their rivalry is currently tied at one win apiece.