Ronda Rousey rips Mayweather again, says she nets more 'per second' than him

— -- Ronda Rousey is taking a few more hard, long-distance shots at Floyd Mayweather.

A few weeks after defiantly saying she could take Mayweather in a no-holds-barred bout, the UFC champion boasted that she earns more than the pound-for-pound king of boxing per second.

"[Floyd] said 'You make $300 million a night, then you can give me a call' ... and I actually did the math and given the numbers of my last fight, I'm actually the highest paid UFC fighter and I'm a woman," she said.

Rousey, approached Tuesday by a TMZ Sports photographer in Los Angeles, said that Mayweather can contact her to discuss her rebuttal to his recent boast about how big a payday he got this year once "he learns to read."

"I think I actually make 2-3 times more than he does per second ... so when he learns to read and write, he can text me," she said in the TMZ video while out walking her dog.

When pressed by TMZ on whether she makes more than Mayweather does, Rousey responded, "Yeah, I'm just more efficient."

Her verbal jab was an apparent rejoinder to a comment Mayweather made on ESPN's SportsCenter earlier this month on how much money he made this year.

"I've yet to see any MMA fighter, or other boxer, make over $300 million in 36 minutes," Mayweather said. "When she can do that, then call me."

Rousey has been sharply critical of Mayweather in the recent past, refusing to back down in her war or words in early August when she said she could beat boxing's biggest champion in a no-rules mixed martial arts-style fight in the octagon.

Her challenge came almost a month after she told reporters after winning an ESPY award for Best Fighter, for which Mayweather was a nominee: "I wonder how Floyd feels being beat by a woman for once. I'd like to see him pretend to not know who I am now."

Rousey said she had been waiting for the right opportunity to call out Mayweather, who in a July 2014 interview said of her, "I don't even know who he is."

Rousey (12-0) is the only women's bantamweight champion in the UFC's history. A two-time U.S. Olympic judoka, she has dominated her new sport. She defended her title by knocking out Bethe Correia only 34 seconds into the first round at UFC 190 in early August.