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Steve-O‘s descent into drug abuse included a three-hour bender in a bathroom with Mike Tyson.

“I’ve done f—–g cocaine with Mike Tyson,” the former “Jackass” star told GQ. “We spent three hours locked in a bathroom together.”

After crashing a party in the Hollywood Hills, the 41-year-old reality star recalled Tyson, 49, opening the door and asking whether he had any cocaine with him.

“I told him, ‘Yeah, dude, I got a bunch.’ And I did. I had a whole eightball in one pocket, half an eightball in the other pocket,” he explained. “So we locked ourselves in this bathroom. He asked me for a cigarette while I was chopping up blow on the counter.”

Among their topics of conversation: racism.

“I said to him, my exact words, ‘You know, Mike, I don’t have a racist bone in my body, but I like to consider myself a n—-r,'” Steve-O continued. “I’ll never forget, he said, ‘You ask me, the definition of that word is anybody who uses it.’ And I was like, ‘Damn! Iron Mike, deep as f–k!'”

“And so we’re talking about the finer points of racism in America, or whatever, just sort of philosophizing about how to make the world a better place, and it was f—–g incredible, man.”

Though Steve-O doesn’t see much of Tyson today, the MTV personality recalled the exact moment he realized that drug addiction had taken over his life.

“I struggle to believe how I got to a place where I’m in this f—–g drug dealer’s place scraping s–t off this table, which had visible f—–g blood mixed in,” he revealed. “I was scraping up blood and cocaine and I f—–g snorted it. I was snorting up dried blood.”

Following his stint in rehab in 2008, Steve-O shared that he’s still trying to sort his life out.

“I’ve survived all these years, but it’s a pretty f—–g hollow existence, I think, when that’s what you’re basing your happiness on,” he said. “I’m a work in progress.”