Floyd Mayweather has taken aim at Conor McGregor, and fight fans in general, following the Irishman’s TKO defeat at UFC 257.

McGregor (22-5 MMA, 10-3 UFC) was finished in the second round by Dustin Poirier in the main event on “UFC Fight Island,” as the Irishman’s latest octagon appearance ended in his third defeat in his last six UFC appearances.

After the fight, Mayweather, who stopped McGregor in the 10th round in their much-hyped boxing match in 2017, jumped on his Instagram page to slam his former opponent and criticize fans for backing the Dubliner while also hating on him.

Mayweather shared a post that asked “Why is @floydmayweather hated for the way he carries himself but @thenotoriousmma is loved for the same way he carries himself?” and responded with a long rant about the Dubliner, who he dubbed “Con Artist McLoser,” as he called out fans for racism because he doesn’t feel as beloved by fight fans as the former two-division UFC champion.

“I seen this post and my take on it is that the world knows Con Artist McLoser can steal everything from me and be loved but I’m hated,” he complained. “That just lets you all know that racism still exists. Just know, that bum will never be me or be on my level. I’m just built different, my mindset is on another planet, my skills are second to none, I’m a natural-born winner and yes I talk a lot of trash, but every time I back it up! This is what they hate.

“It’s sad that you can be a poor black kid from the ghetto that has dealt with racism your whole life and work extremely hard to put yourself and your family in a better position, and most of the hate comes from my own people.”

Mayweather then turned his attention back to McGregor as he mocked the suggestion that the Irishman could potentially face his former rival Manny Pacquiao inside the boxing ring later this year.

“Connor (sic) cannot even win in his own sport,” he said. “But talking about coming back to boxing to fight Pacquiao. Nobody wants to see that, it’s like my leftovers eating leftovers.”