UFC superstar Conor McGregor remains firm that his next appearance in a fight will be against retired former five division world champion Floyd Mayweather Jr.

Last fall, McGregor secured a license to box from the state of California and vowed to take part in a boxing match with Mayweather.

The two athletes have traded words for over a year in the press and on social media.

A few weeks ago, UFC President Dana White made an offer of $25 million to Mayweather for a fight with McGregor, under boxing rules, and on pay-per-view.

Mayweather, who retired in September of 2015,  laughed at White's offer, and called the UFC executive a "f***ing comedian."

During an interview on Saturday with MMA reporter Ariel Helwani, McGregor was in rare form and unleashed his venom at the UFC, Mayweather, and just about everyone else.

“Heading to do a Q and A in front of 5000 fans! You read that right. That’s more than UFC attendance tonight. F*** the UFC. F*** Floyd. F*** boxing. F*** the WWE. F*** Hollywood. And F*** you too pay me.”

“One-hundred percent [I think the Mayweather fight will happen] I believe the next time I step into a combat arena will be through the ropes wearing 10-ounce or eight-ounce gloves. I believe so.”

“There’s Mayweather Promotions, there’s the UFC, and now the newly formed McGregor Promotions, and we’re all in the mix. Nobody is my boss. I know Floyd likes to say Dana [White] is my boss and this and he decides. Hell no. Nobody decides this. If they let people go fight jiu-jitsu tournaments, they can’t stop me going to fight a boxing fight. So obviously it’s smoother to do it all together, but look, everyone’s just got to know their place, and everyone does know their place.”

“[Mayweather is] the scared side, let’s be honest. He’s not trying to have a real fight. He needs rules to protect him. I don’t need rules. So he can say he’s this and he’s that, but in reality, he’s scared sh*t-less. If I decide to just fight him straight-up – look, f*** the UFC, f*** MMA, f*** boxing, f*** sports fighting. Let’s just say we fight. It’d be the easiest fight ever.”

“The sound of laughter and the sound of doubt motivates me so I’m enjoying that. I don’t feel that going to fight any of these other UFC bums right now. They need to rise up. Right now, they’re down there. I’ve got this situation where people are truly doubting me, like they doubted me at the very, very beginning, and that’s motivating for me.”