Mr Joyce is on five days’ personal leave after news broke that the married father-of-four was having a baby with his former staffer Vikki Campion.

Speaking on his comedy show Last Week Tonight, Oliver made fun of the scandal by pointing out that Mr Joyce had opposed gay marriage in Australia due to his belief in traditional family values.

“You might think that that is hypocritical, but in reality Joyce has such incredible family values that he can’t restrict them to just one family,” he joked.

“The Australian media has understandably jumped on this story like a deputy prime minister with a wife and four children jumping on his 33-year-old former media adviser.”

Oliver also took a swipe at Ms Campion’s father, showing a Seven News clip of an angry Peter Campion saying: “I think a deputy PM on a spit would be quite a sight.”

Oliver couldn’t help but mock the bearded man.

“I think that might be the most Australian man who has ever lived,” he said.

“In Australia, they don’t actually have Santa Claus, they just have that guy coming down your chimney and, whether you’ve been bad or good, he just beats you with a newspaper.”

This is not the first time Oliver has lampooned the Deputy PM.

When the Nationals leader threatened to euthanise Johnny Depp’s pet dogs Pistol and Boo when he snuck them into Australia in breach of strict quarantine laws, Oliver said: “I’ve got to say that’s pretty ballsy. Elected officials very rarely risk openly telling puppies to go f**k themselves.”

Meanwhile, Mr Joyce has rejected suggestions that he could be kicked out of office, saying “I’m not going anywhere”.

In an interview with Fairfax Media, the Deputy Prime Minister said he would not back away from the fight on his hands.

“I’ve been in heaps of fights in my political life; this is another one,” he said.

“I am humbled by the support in my electorate and in the community. People are starting to see this as a witch hunt. I’m not going anywhere; I never would.

“People know enough about me to know that I’m hardly one to run away from a fight.”

Prime Minister Malcolm Turnbull, who will fly out to Washingont tomorrow to visit US President Donald Trump, said Mr Joyce’s affair had harmed the government.

Two in three voters believe Mr Joyce should quit as Nationals leader over the scandal, according to the latest Newspoll.

“It’s distracting and it’s unhelpful,” Mr Turnbull told 3AW.