Ramona Singer is firing back at fellow “Housewife” Leah McSweeney and frequent guest star Elyse Slaine, who continued their feud with Singer in a wild video Slaine made for Cameo — in which they make the bizarre claim that their rival “s–ts” when she has sex.

“I believe that ‘Real Housewives of New York’ is a classy, elegant franchise, and I think the two of them are degrading it through social media. It really upsets me,” Singer, 63, said in an exclusive interview with The Post. “I know Elyse is desperate to be on the show, but she lost a friendship over it.”

In the video, McSweeney, 49, alleged that Singer “s–ts during sex,” but provided no further details about her claim as to why Ramona “can’t meet a man.”

Singer poo-pooed the allegation as a bunch of crap.

“I don’t have a problem,” Singer said. “It’s very defamatory, dispirited and not respectful.”

The latest feud began on Cameo, where fans can pay for personal videos from their favorite stars. Twitter user Heather Foley shared the video on Wednesday she had purchased for her friends she watched “RHONY” with. “It’s too good not to share,” she wrote of the custom clip from Slaine, which cost $50.

“I hear that … Ramona is driving you crazy,” Slaine, 56, says to the camera. “If she’s making you crazy, what should I say?”

Recently, Singer and Slaine have been feuding on the Bravo show. Though Slaine has been featured along with the main cast members, she was brought on the show as Singer’s friend. However, that friendship quickly deteriorated. Slaine isn’t a fan of Ramona’s top-dog antics, as she’s said on the show, and Singer feels Slaine owes her for introducing her to “RHONY” viewers.

“Really, Ramona, with, ‘I’ve got 50 best friends,’ ” continued Slaine, mocking a common brag Singer uses about her large social circle. “Well guess what, b–ch, now she’s down to 49, cuz I am out.”

“I have a friend who wants to give you a little tea about why Ramona can’t meet a man,” said Slaine, bringing out McSweeney.

“She s–ts during sex,” McSweeney alleged, much to Slaine’s surprise.

In a statement to The Post and on Instagram, the longtime castmember denied the claims and called them a form of bullying. “There is absolutely no truth to this. These girls are blatantly lying to create fake news in order to try and gain their own fame,” Singer said. “It is very sad, immature and quite frankly mean girl behavior.”

Speaking over the phone, Singer slammed the allegations. “Elyse used me for fame and she’s continuing to do that to get what she wants,” she said. “She was never a true friend, she just wanted to be on the show.”

Singer said that when Slaine came onto the show, she warned the “RHONY” novice that she would have to take care of herself. Recalling the recently aired episodes on Halloween and in The Berkshires, “Elyse is like, ‘You don’t pay attention to me, you don’t pay attention to me,’ because she wanted to have a confrontation,” Singer said.

“I couldn’t say to Elyse, ‘I’m not paying attention to you because I need to do other things to create a good show and you’re not a main character, you’re a side character,’” the reality star stated.

She also addressed McSweeney’s bathroom blast. “As far as bowel movements? That happened to all the women in Cartagena, we all got horrible parasites in Cartagena, we all exploded all over the house. And that’s what I guess Leah is referring to, because I don’t have a problem,” said Singer, referring to a trip taken to Colombia on Season 10.

Shocked that McSweeney would make such a claim, Singer said, “Leah doesn’t live up to the franchise, I feel like she and Elyse are demeaning [it].”