Despite him being famous as the undefeated American boxer, there are still some people who do not know Floyd Mayweather Jr., including a Jamaican lady in London who definitely earned the ire of the fighter for her lack of knowledge of him.

A USA Today report posted a video of Mayweather confronting a woman while he was in London for not having any idea who he was.

"I don't know you, so what's the big deal?" the woman questioned him.

The visibly stunned and irked Mayweather, who seemed to be on a salon chair, asked the woman if she watches television or uses Google.

She, however, continued that she's not a fan of boxing, though she claimed that she knows Mike Tyson.

"I like big fights, I like exciting fights. He's not big at all," the Jamaican woman added.

This prompted Mayweather to ask the woman if she knows about Forbes magazine. The boxer was recently hailed as the top earning athlete in the world by Forbes with him earning more than $100 million for the past year. He also remains to be an undefeated fighter after he beat Marcos Maidana last month bringing his record now to 47-0.

But these achievements seemed very alien to the Jamaican woman who claimed towards the end of the video that she knew Olympic runner Usain Bolt. Of course, Mayweather pretended he did not know Bolt and kept saying: "Who? Who? Who?" He also bragged to the fierce woman that he earns about $100 million just by working 60 minutes.

This type of behavior from the America boxer is not new to the boxing world even to his fans. His latest heated verbal exchange online was with his rumored opponent next year, no less than Filipino boxer Manny Pacquiao.

It started with Mayweather posting photos on Instagram of Pacquiao falling on the canvas when he knocked out by Juan Manuel Marquez. The said post came with the caption: "My new boxing DVD is coming soon and is called '3 Ways to Sleep.' Back, Face and Butt and I'm Falling & I Can't Get Up. Miss Pac Man is broke and desperate for a pay day. Your Pay-Per-View numbers are a joke."

Pacquiao, in response to Mayweather's attacks, said that he is not angry with the American boxer but noted that he feels sorry for him. "He acts like an uneducated person. It's pitiful to me and I'm praying for him. He should fear God," he was quoted by ESPN in a report.

It seems that with this latest online post of Mayweather, his fight with Pacquiao remains blurry and undecided since reports reveal that the American will only agree to fight with the latter if the PPV numbers are good.

But if he claims and broadcasts that Pacquiao's figures are dwindling, then there is a big possibility that he is only looking for ways to escape fighting the Filipino boxer before both of them retire in the coming years, several outlets speculate. Still, a lot can happen in that span of time.

Pacquiao is set to face Chris Algieri next month in Macau while Mayweather earlier claimed that he has two fights left before he retires.