The Funny thing about Obama ... is that there’s nothing funny about Obama.

On his HBO show, “Real Time With Bill Maher,” the comedian routinely makes vicious fun of celebrities, politicians, presidents and even God. But he’s learned that, for much of his audience, Barack Obama is off limits.

Not long after the historic presidential election, Maher joked that Republicans were feeling particularly superstitious: “They say the country is having bad luck because there’s a black cat in the White House.” The studio audience erupted in loud groans and boos — a reaction, Maher observed in a recent interview, that exceeded his often scathing attacks on organized religion.

“Obama is the new God,” quipped Maher of the poorly received dig, which he pointed out pokes at conservatives more than the commander in chief.