Floyd Mayweather crossed the line with the latest insult he hurled at rival Conor McGregor

Photo by: KGC-125/STAR MAX/IPx 2017 7/13/17 Floyd Mayweather and Conor McGregor at the Floyd Mayweather Jr. v Conor McGregor World Press Tour in New York City.

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(Warning: This video contains foul language.)

During his London news conference to promote his upcoming fight against Conor McGregor on Friday, boxer Floyd Mayweather took their name-calling jabs to another level when he called his rival a homophobic slur.

The fighters were wrapping up the conference when Mayweather grabbed the microphone and started hurling insults at McGregor by calling him a “punk, f****t, ho.”

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McGregor, who was accused of making racist comments towards Mayweather on Tuesday when he told Mayweather to “Dance for me, boy,” didn’t give his future opponent a reaction. When asked about the incident, Mayweather responded by saying, “I don’t worry about that.”

Now, it seems it’s his turn to take some heat for his controversial comment.

RELATED: This Conor McGregor tweet fuels rumors of a Floyd Mayweather fight

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