Floyd Mayweather didn’t hold his tongue when Conor McGregor used racially insensitive language to promote their 2017 “Money Fight” showdown. And after McGregor fell to Dustin Poirier at UFC 257, the semi-retired boxing legend wasted no time in savaging the former two-division champ and his fans as the world reacted to Poirier’s win on Fight Island.
In an Instagram post, Mayweather dubbed his one-time opponent “Con Artist McLoser” and attributed his popularity...