The Irishman, who was there to support his friend and longtime training partner Artem Lobov as he looked to defeat Team Alpha Male's Andre Fili, managed to get his name right into the headlines when a rather freakish incident caused a mid-fight stoppage during the second round of Lobov's fight. Both videos have since been deleted but raw copies of the footage are still available on various social media postings.
This isn't the first time McGregor has been caught making insensitive comments.
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It is unclear who McGregor's slur was related to.
"In my head, Conor defends the belt against Tony", said Lobov. "In the mean time, Khabib can fight the victor of Alvarez and Gaethje". McGregor was shouting directions and pacing around the Octagon before his the referee stopped the fight and told him to "be professional and go back to his seat".
Tweeting helped me become USA president, says Trump
Last month he lambasted National Football League players who had kneeled in protest at police brutality and racial inequality. Trump said in September that the United Nations had not reached its potential because of "bureaucracy and mismanagement".
"You guys are gay mafia too?" reads another tweet directed at MMA Fighting and Raimondi himself.
McGregor was constantly out of his seat offering advice to Lobov, seemingly chomping at the bit to help his teammate from the SBG Ireland in Dublin over the line.
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During the press tour leading up to his mega money showdown with Floyd Mayweather, in August, McGregor claimed to be "black from the belly button down" in response to previous accusations of racism, thereby reducing black men to a crude stereotype. "We're all human here at the end of the day - regardless of color, gender, sexuality". We all deserve the same rights. More than 5 million purchasers of the PPV fight made it one of the best-selling pay-per-view events of all time.