Charlie Sheen has apparently appointed himself the arbiter of jerks.

The 47-year-old actor was infamously booted from “Two And A Half Men” two years ago after engaging in a series of apparently drug-fueled disputes with CBS, Warner Bros, and Chuck Lorre, but that’s not stopping him from throwing jabs at disgraced cyclist Lance Armstrong.

In an appearance on Jay Leno’s “The Tonight Show” that will air Thursday, Sheen had some strong words for Armstrong.

"He's kind of a douche," Sheen told Jay Leno, referring to the former Tour de France winner’s recent interview with Oprah Winfrey where he admitted to using performance-enhancing drugs for the first time.

"Wow, I didn't just say that, did I? Sorry, Lance," Sheen added.

The troubled actor shared a memory of first meeting the athlete years ago. According to Sheen, he politely introduced himself to Armstrong, but was basically snubbed by the cyclist.

“I was at a party. … I think he was talking to Sheryl Crow at the time, and I walked up and I said ‘Hi Mr. Armstrong, I’m Charlie Sheen. Do you want to say “hello”?’” Sheen recalled. “And he said to me, he goes, ‘That’s nice.’”

In a mock aside to Jay Leno, Sheen pretended to respond to Armstrong, saying, "Sorry to bother you, Captain Bitchin'. Go get a paper route, dude," to audience laughter.

Leno, who told Sheen he agreed with him about Armstrong, added, “You know what makes me mad about him? It’s not even the fact that he cheated. … It’s the fact that you ruined the lives of the people who called you on it.”

Sheen, a veteran of scandal, concurred, calling Armstrong’s behavior “creepy.”

"If he was a better guy I think  in his life, he'd be forgiven a lot faster and a lot easier,” Sheen said, before adding humorously, “kinda like me.”

View the advance video of Sheen’s appearance below.