Conor McGregor has been accused of using a racial slur in his latest attack on Khabib Nurmagomedov as he compared his rival’s wife to a “towel.”

McGregor, 30, tweeted a picture of Nurmagomedov on his wedding day in which the fighter’s partner has a veil covering her face, a tradition in Muslim culture.

The tweet was captioned, “Your wife is a towel mate.”

McGregor swiftly deleted the tweet but not before it was retweeted thousands of times, with many accusing the MMA fighter of Islamophobia.

The Irish star has faced backlash from fans who called the (retired?) MMA fighter racist.

One said: “Wow. What’s the point of attacking another man’s wife and their culture?”

Another said: “As an Irishman, my default setting is to support any Irish competitors in any endeavor. We’re a small country with an us against the world fighting spirit. But McGregor’s racist, homophobic bulls*** is a black eye on what being Irish is.”

Nurmagomedov, 30, has a son and a daughter with his wife, whose name is unknown.

The Russian is a practicing Muslim and has previously called out McGregor for offensive comments he made in the build-up to their grudge match and blamed the UFC 229 post-fight brawl on his rival’s trash talk.

“I no understand how people can talk about I jump on cage — he talk about my religion, he talk about my country, he talk about my father,” Nurmagomedov said in October.

One post that did remain undeleted was McGregor calling his rival a “scurrying rat.”

It comes one week after The Notorious announced his shocking retirement from MMA — but it has not stopped the Irishman from calling out Nurmagomedov for a rematch.

Nurmagomedov submitted The Notorious at UFC 229 in October, and it seems the former two-weight champion is seeking revenge.

McGregor, who has a son and daughter with his partner, Dee Devlin, tweeted: “Don’t be scared of the rematch you little scurrying rat. You will do what you are told like you always do.”