Donald Trump is 'sick' and a 'liar' claims one of the billionaire businessman's peers in a new interview - Hustler founder Larry Flynt.

The porn pioneer and renowned publisher of adult magazines and videos does not hold back in the latest issue of Man of the World, making it very clear how little he cares for the Republican nominee.

'Trump is such a narcissist, such a liar, I don’t even know that he’s conscious of every lie he tells. He’s really a sick puppy,' said Flynt, who described Trump as a 'carnival barker' as well in the interview.

The five-times married septuagenarian also revealed that he will be voting for Hillary Clinton in the upcoming election not because he is a passionate supporter, but rather because 'she’s not nuts.'

'Trump is,' explained Flynt.

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Over it: Hustler publisher Larry Flynt, 73, is attacking Donald Trump in a new interview (Flynt above at the 2006 Adult Entertainment Expo in Las Vegas)

Not mincing words: 'Trump is such a narcissist, such a liar, I don’t even know that he’s conscious of every lie he tells. He’s really a sick puppy,' said Flynt (Trump above on Thursday)

Flynt, who is paralyzed from the waist down as a result of being shot in 1978 by serial killer Joseph Paul Franklin, has run for political office himself over the years, but failed to win any of his elections.

In 2003, he was one of the 135 candidates who ran in the California gubernatorial recall election, finishing in seventh place. Arnold Schwarzenegger won that election and went on to serve two terms as governor of the state.

Flynt supported Barack Obama over Mitt Romney in the 2012 presidential election, and offered a $1million reward to anyone who could produce Mitt Romney's unreleased tax returns.

This is not the first time that Flynt has gone after Trump, with the 73-year-old having been very vocal about his disdain for the real estate scion-turned-politician.

In an interview with Hoss Magazine earlier this week, Flynt said: 'The thought of Donald Trump becoming president nauseates me in a big way.'

When asked by Hoss publisher Sean Rice what he might do should Trump win the election, Flynt said: 'I don’t know, maybe move to Canada.'

Flynt also very publicly mocked the size of Trump's manhood in interviews earlier this year, and at one point even offered to have doctor's examine the size of his genitalia after Trump very publicly implied that he had a large penis in response to an attack by Marco Rubio about the size of his hands.

'[T]he kind of cars he drives and the kind of buildings he builds, it all has to do with trying to compensate maybe for a lack of manhood,' Flynt said in a March interview with The Daily Beast.

'Trump’s probably got a three-inch d***.'

He also compared Trump to Mussolini in that interview.

Reasoning: Flynt (left in 2004, right in 2007) also said that he will be voting for Hillary Clinton because 'she is not nuts'

A month later, Hustler studio released a Trump porn parody called The Donald.

'The downward spiral of name-calling in the GOP Presidential primary campaign is a national embarrassment and an insult to the intelligence of the American people, but it’s also the perfect catalyst for the debauchery that HUSTLER Video has concocted in The Donald,' said Flynt in a press release at the time.

'This parody is my contribution to the most entertaining Republican Party contest in recent history.'