#2. Colby Covington - UFC welterweight
Colby Covington is widely considered to be the UFC's in-house heel figure. Fans and pundits acknowledge that a lot of what Covington has to say is a part of the role that he plays.
Colby Covington was nuked by a myriad of fighters and a legion of fans after his comments about Tyron Woodley and the Black Lives Matter movement. In the wake of his triumph at UFC Vegas 11 against Woodley, who had used his platform to talk about BLM, Covington made comments that were perceived to be racist by many.
"He’s standing up for lifelong criminals. The Black Lives Matter is a complete sham. It’s a joke. They’re taking these people that are complete terrorists. They’re taking these people that that are criminals.”
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Covington also got into a verbal scuffle with Kamaru Usman after his UFC Vegas 11 win. It came after he made comments that suggested Kamaru Usman's "tribe" contact him with smoke signals.
Colby Covington had previously come under fire for making similarly insensitive comments about Brazil and its citizens after defeating Demian Maia at UFC Fight Night 119 back in October 2017.
In fact, UFC Senior Vice President David Shaw subsequently revealed that his comments were being reviewed by the UFC's code of conduct committee.
#1. Conor McGregor - UFC lightweight
Conor McGregor is perhaps the most well known fighter to have come out of the UFC. From hardcore and casual fans to those who don't watch MMA, the name McGregor is one that everyone has heard.
Having established himself as one of the greatest trash talkers in the business, the Irishman has thoroughly entertained the fans. However, he has frequently crossed the line when it comes to trash-talk.
Conor McGregor was heavily criticized for dragging Dustin Poirier's family into their feud after his most recent loss against him at UC 264. McGregor was even seen issuing death threats to 'The Diamond' and his family.
McGregor was also chided for his frequent tweet-and-delete sprees. In one, he trained his aim at Khabib Nurmagomedov's late father Abdulmanap Nurmagomedov. During his 2018 feud with 'The Eagle', McGregor frequently referenced Khabib's family, religion and country.