A “Wheel of Fortune” contestant’s viral intro — in which he railed against his “battle-ax” wife and no-good stepkids — was all in good fun, the married couple told The Post Wednesday.

Offbeat humor and boundary-testing jokes have always been a part of Blair and Kim Davis’ relationship, they said.

“We are constantly calling each other different names around the house,” said Kim, 49.

During his appearance on the game show on Tuesday night, Blair, 50, introduced himself as “trapped in a loveless marriage for the last 12 years to an old battle-ax named Kim.”

“She cursed my life with three stepchildren, named Star, RJ and Ryan, and I have one rotten grandson.”

But Blair then made it clear he was just joshing around saying of his family: “I love ’em like nobody’s business.”

A clip of the jokester’s opening went viral, with some Twitter users calling it the “best of all time.”

“Finally, someone was truthful,” one person wrote.

It was a hit at home, too. “I already knew it was coming,” said Kim, who was at the show’s taping. “Everybody [at home] laughed.”

The “battle-ax” gibe is “one of the nicer” names the pair call each other, she added.

When she found out her husband would be appearing on the game show, Kim said she had one request.

“We watch the ‘Wheel of Fortune’ all the time and people are always saying, ‘my gorgeous wife’ or ‘my handsome husband,’ ” she said. “I told him not to say ‘my gorgeous wife,’ because I didn’t want the audience to think, ‘Oh my gosh, she’s not gorgeous. Why would he say that?’ ”

Blair added that he and Kim see “how politically correct [contestants] are for their loved ones” on the show, so he wanted to be “a little more realistic.”

The pair, who run a trucking and property business in San Diego, met online in 2005 and Kim was immediately struck by ­Blair’s “sense of humor.”

When they eventually met in person at a bar, “I fell in love with her the moment I saw her,” Blair said.

“My wife is extremely intelligent and really beautiful,” he said. “I’m lucky to have her.”

Blair walked away with $6,000 in winnings, which he and his wife say they plan to save.

The couple was more shocked that Blair’s intro made such waves.

“We thought cracking jokes was normal,” Kim said. “Apparently, it’s not.”

Additional reporting by Tamar Lapin