Conor McGregor split from his boxing partner Paulie Malignaggi who has refused to regret quitting the training camp of the mixed martial arts fighter.

The 36-year-old Malignaggi, who retired from boxing five months ago, walked out of training camp last week after he said McGregor used him like a pawn, disrespected him in the dressing room and housed him and the other sparring partners in dumpy accommodations.

"He's a scumbag," Malignaggi said of McGregor in an interview Monday with the American website The MMA Hour.

Malignaggi was also upset about training camp pictures made public that show the Irishman in a positive light.

"The guy is all about his ego. He's actually not trying to get better. He's got a bunch of yes men in his corner who tell him he's doing good even if he's doing bad. It is just about him and cheerleading," Malignaggi told MMA Hour.

He said he asked McGregor to stop releasing misleading sparring photos that showed the MMA fighter getting the better of the exchanges. McGregor refused.

"At this stage I'm waiting for Ashton Kutcher to walk into the dressing rooms and tell me I got Punk'd. I thought it was a joke. I thought there was no way this guy is that much of an asshole," he said.

McGregor is preparing to face boxing star Floyd Mayweather in a Las Vegas boxing ring on August 26 in what could be one of the richest fights in history.

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