McGregor challenges Mayweather to MMA bout: 'Let's f---ing do it'

(Warning: Story contains coarse language)

Conor McGregor wants another crack at Floyd Mayweather Jr. - this time, in the Octagon.

The Irishman issued a challenge to the retired boxer while being interviewed by Caroline Pearce in Glasgow in September. The full video of their hour-long chat was made public Friday.

"What sickens me is that the little motherfucker is retired now. If I had another go with him, under boxing rules, I'd get that win," McGregor said, according to Alan Dawson of Business Insider. "He had to change his whole approach. With those lessons I learned, with another go around, I'd get it. He's 50-0 and getting on, I'm not calling him out. I'll sit back. We'll see how he gets on with this round of money. Maybe I'll get another call. Originally he was saying an MMA bout next. That's what he said before the fight.

"He did say an MMA fight. So if he wants to, let's fucking do it. There's not a hope in hell ... I'd like to see him come over to our side and have a knock. I earned their respect and put myself out there. Style over to my side and earn our respect now."

Though McGregor doesn't sound overly optimistic about the chances of another bout, some believe it will happen. Hall of Fame boxing commentator Jim Lampley told TMZ Sports recently that Mayweather "obviously" let McGregor win some of the early rounds of their Aug. 26 fight to set up a rematch.