The Pervnado is now hitting Sin City.

Dozens of people claim casino bigwig and Republican National Committee finance chair Steve Wynn is a massive creep who has pressured low-level employees at his gaming palaces and hotels into sex and deliberately exposes his junk by wearing tiny shorts at work, according to a bombshell new Wall Street Journal report.

A manicurist from a Wynn Las Vegas salon says she showed up for a private appointment in his office in 2005, where the billionaire told her to take off her clothes and demanded they have sex. She said no — but he eventually pressured her into it, the Journal reports.

She later filed a complaint with human resources, and Wynn paid her a $7.5 million settlement, sources tell the paper.

At the hotel’s spa, workers hid in the bathroom to avoid being the subject of his sexual advances, former workers claim.

“Everybody was petrified,” Jorgen Nielsen, a former artistic director at the Wynn Las Vegas hotel’s salon, tells the paper, saying he told high-level company executives about the problem, but “nobody was there to help us.”

One former massage therapist claims Wynn pressured her into giving him months of happy endings several years ago — and then tried to escalate to oral sex.

Wynn started by exposing himself during their several-times-a-week sessions, before ordering her to masturbate him to climax — a command she didn’t feel she could refuse, she tells the Journal.

After months of these appointments, he asked her to perform oral sex, but she said no and finally told him the requests were making her uncomfortable. He halted the sessions.

Other Wynn workers say he would often walk around wearing extremely short shorts and no underwear so everyone copped an eyeful of his manhood, the paper reports.

“So when are you going to come into my office and f–k me?” he allegedly asked one former office worker.

Despite rebuffing his advances, she says he subsequently rubbed his genitals — which were hanging out of those tiny shorts — and grabbed her while asking for a kiss.

And Wynn’s alleged misconduct spans decades, according to the report: In an early-1990s lawsuit, a former executive at the Golden Nugget said he “routinely received complaints from various department heads regarding Wynn’s chronic sexual harassment of female employees,” while his boss also told him to get the home phone numbers of cocktail waitresses, the Journal reports.

Wynn denied all the accusations to the paper, claiming it was all a smear campaign by his ex-wife Elaine Wynn.

“The idea that I ever assaulted any woman is preposterous,” Wynn told the Journal in a statement.

“We find ourselves in a world where people can make allegations, regardless of the truth, and a person is left with the choice of weathering insulting publicity or engaging in multi-year lawsuits. It is deplorable for anyone to find themselves in this situation.”