Jeff Wittek claimed he saw people having sex at one of Sean “Diddy” Combs’ “f—king crazy” parties around 2010.

“I actually went to a Diddy lingerie sex party,” he alleged on the Sept. 29 episode of his “Jeff FM” podcast.

“A ‘freak off’ party in Miami at a mansion that was like eight stories high and it just kept going up and the higher you went the weirder s—t was,” he claimed.

The comedian, 34, told guest Mike Majlak that he met the disgraced rapper through one of his ex-girlfriends, who got cast in Diddy’s music video and brought him along for the shoot.

When they arrived at the filming location, Wittek claimed the music mogul “pulled [his girlfriend] to the back” and questioned why she brought him.

However, in light of the sexual assault allegations against Diddy, Wittek and Majlak questioned if the Bad Boyz Record founder had other intentions.

“He was going to dump all that bulk lube on you, dude,” Majlak joked, referencing the 1,000 bottles of baby oil and lube seized from Combs’ homes in a series of raids.

Despite Diddy’s hesitancies, Wittek — who was around 20 at the time — stuck around for the day and they ended up being invited to the after-party.

While the Youtuber thought it would be a “normal party,” he realized he was mistaken after his girlfriend and her friend came out wearing “lingerie with their nipples showing through.”

“They were like, ‘You don’t understand these Diddy parties,’” he recalled. “And I did not understand because I saw live sex happen that night and that’s the first time I’ve ever seen that happen in my life.”

“Did I partake? No, but I got f—king drunk there and it’s just crazy,” he added.

Combs, 54, was arrested and charged with sex trafficking, racketeering and prostitution last month.

In a 14-page indictment, feds claimed the jailed rapper threw drug-and-alcohol-fueled sex parties often laden with violence.

“Combs subjected victims to physical, emotional, and verbal abuse to cause the victims to engage in Freak Offs,” the formal charge read.

“Combs maintained control over his victims through, among other things, physical violence, promises of career opportunities, granting and threatening to withhold financial support, and by other coercive means, including tracking their whereabouts, dictating the victims’ appearance, monitoring their medical records, controlling their housing, and supplying them with controlled substances.”

In the wake of his arrest, dozens of people have come forward about their alleged experiences with Diddy.

In fact, on Tuesday, attorney Tony Buzbee announced he is representing 120 people — a group divided evenly between men and women — who claim the “I’ll Be Missing You” rapper sexually assaulted them in the last 30 years.

Twenty-five accusers claim they were underage at the time of the alleged assault, with the youngest alleged victim being just 9 years old.

Buzbee suggested that Combs wasn’t the only high-profile figure involved in the alleged crimes and that “many powerful people” and “many dirty secrets” would be unveiled soon.

“The day will come when we will name names other than Sean Combs, and there’s a lot of names,” he said in a press conference.

“It’s a long list already, but because of the nature of this case, we are going to make damn sure —damn sure— that we’re right before we do that. The names will shock you.”