Donald Trump is threatening to take Bill Maher to court after the "Real Time" host failed to pay him $5 million after Trump proved he isn't the child of an orangutan.

Yes, you read that right — this isn't some weird fever dream.

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The Donald, perhaps suffering from a post-Super Bowl lack of attention, called in to Fox News' "Fox & Friends" on Monday to announce his planned lawsuit, which will seek the $5 million from Maher.

In January, Maher made light of Trump's questioning of Barack Obama's birthplace by joking that Trump was spawned from sex between a human and an orangutan. He told "Tonight Show" host Jay Leno that he would pony up $5 million for charity if Trump offered proof of his lineage.

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Trump promptly furnished a copy of his birth certificate to Yahoo News — along with a demand that Maher pay up.

Nearly a month later, Maher still hasn't made good on his no-doubt earnest offer, and Trump is suing-mad.

"He promised me $5 million for charity if I provided certain information," His Hairness told "Fox & Friends" Monday. “Well, I provided the information. He didn’t pay. So today I sue Bill Maher for $5 million for charity."

When it was suggested that comedian Maher might have been, well, joking, Trump brushed the possibility aside.

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"I don't think he was joking. He said it with venom. That was venom. That wasn't a joke. In fact, he was nervous when he said it; it was a pathetic delivery. But he said, 'I will give,' and said, 'I will accept.'"

A spokeswoman for Maher has not yet responded to TheWrap's request for comment. But if Trump is as serious about the lawsuit as he was about a 2012 presidential run, Maher likely doesn't have anything to worry about.

Listen to Trump's legal threat against Maher in the video: