Matt Damon is an insufferable jerk. You know it. I know it. Rupert Everett most certainly does.

The Hollywood liberal (read: smug hypocrite) has interrupted the outer-space high surrounding Friday’s release of his Oscar-bait star turn, “The Martian,” to conduct a parallel “I’m Not a Homophobe” tour. But it’s only driving him deeper into the quicksand with LGBTQ types and those, like me, who couldn’t care less whom a performer loves. It’s 2015, Matt. Get over yourself!

He should grovel. GLAAD should dedicate a lecture series to him.

He should shut the hell up.

I’ve about ceased getting worked up over idiocies uttered by famous lefties. (Filmmaker Michael Moore alone could send me into agonizing paroxysms if I let him.)

But pathetic utterances made by Damon, 44, about race and, especially, homosexuality in the last few weeks have sucked him from Mars down into the sewer of soiled progressivism, and earned him the Twitter hashtag “#mattsplaining,” a takeoff on “mansplaining.”

In an interview with The Guardian last month, Damon grappled, in cringeworthy detail, with an issue best left to a priest, a rabbi or a psychotherapist: his own sexuality — and that of his Tinseltown cohorts.

The conversation turned to Damon’s portrayal of Liberace’s gay lover in 2013’s “Behind the Candelabra.” And Damon launched into a mattsplanation about gay rumors that swirled around him and buddy Ben Affleck after they worked on 1997’s “Good Will Hunting.’’ He seemed most freaked out about being forced (in his mind) to deny he was homosexual.

“It’s just like any piece of gossip . . . and it put us in a weird position of having to answer, you know what I mean? Which was then really deeply offensive,’’ he said.

“I don’t want to, like, [imply] it’s some sort of disease — then it’s like I’m leaving my friends under the bus.”

He should have stopped there. But his mattsplaining (and gay-shaming?) was just getting started.

“But at the time, I remember thinking and saying, Rupert Everett was openly gay, and this guy — more handsome than anybody, a classically trained actor — it’s tough to make the argument that he didn’t take a hit for being out.”

And, drum roll, please, “Whether you’re straight or gay, people shouldn’t know anything about your sexuality because that’s one of the mysteries that you should be able to play. I think you’re a better actor the less people know about you, period.”

Hogwash!

Damon all but shouted, “I’m heterosexual!” by peppering the interview with references to his wife (a woman!), three daughters and a stepdaughter.

Does anyone care?

Damon, who has built his reputation on being a Hollywood good guy, effectively encouraged performers to hide their homosexuality, while enabling Everett’s self-pity. For years, the “handsome,” “classically trained” actor, now 56, has blamed his dearth of roles on his open homosexuality, rather than his appearances in such cinematic stinkers as “My Best Friend’s Wedding.”

Damon found sympathy Wednesday from, of all people, Ellen DeGeneres (a lesbian!), whining on her TV talk show that online trolls had twisted his words to make it seem as if he meant gays should march back in the closet.

Well??

By encouraging sexual “mystery” among performers, Damon dissed the many openly gay people who enjoy stardom on stage, screen and TV. To name a few: Neil Patrick Harris, Zachary Quinto, Jane Lynch. Ellen DeGeneres.

Even before the gay remarks, Damon, a white man, put his foot in it on the Season 4 premiere of HBO’s “Project Greenlight’’ by interrupting black, female film and TV producer Effie Brown with his politically incorrect views on racial diversity. Damon apologized.

But he’s holding firm on his gay philosophy.

I don’t care which stars are gay, nor do I care that Damon says he’s not. I don’t buy movie or theater tickets or click on the TV or Internet hoping to hear celebrities’ unscripted meditations on same-sex relations or skin color. It’s time for Matt Damon to stop protesting.

Maybe getting stranded alone on Mars would do him good.

Times Square surrender bad nudes

Round One goes to the topless cuties.

Members of Mayor Bill de Blasio’s task force commissioned to save Times Square from creepy costumed characters and body-painted desnudas should have stayed home. The bureaucrats last week presented recommendations for reining in tip-seeking cretins, such as appointing a unit of cops to patrol the Crossroads of the World — but not trashing the pedestrian plazas that shield aggressive Elmos and Spider-Man wannabes.

One idea is to restrict the beggars to specific areas of the square — if authorities can figure out how to push around the creatures without trampling on their constitutional right to free expression.

The mayor also expressed support for taxing the miscreants out of existence. But a tax-law expert told The Post that while tips earned from performances are taxable, gifts to panhandlers are not.

Are they bums or artists?

New York City has been handed, gift-wrapped, to the lowlifes.

Amazin’s should be better ‘trained’

If you rode the No. 7 train Friday afternoon, you might have encountered a bunch of polite, athletic fellows from Washington, DC: the Nationals.

Right fielder Bryce Harper and at least seven of his teammates shunned the team bus and hopped on the New York City subway toward their hotel from Citi Field in Queens after a game against the New York Mets was postponed to a Saturday double-header due to rain. A group selfie posted on Instagram by Harper showed that the guys behaved — no pole-hugging, eating, drinking, playing of loud music or manspreading. And no choking.

Public transportation just might hold the key to baseball victory. The Mets should try taking it.

Our gun laws are just nuts

This is one time I agree with President Obama. In grief and frustration, the president told the American people Thursday that mass shootings have become “routine’’ in this country — and the public has grown “numb’’ to them.

Obama was talking about the murders of nine innocents, and injuries inflicted on seven others, at an Oregon community college by a deranged, religion-hating gunman.

The killer committed suicide, said the local sheriff, after police moved in. But I won’t mention his name. The sicko’s online rants showed that he sought fame from spilling blood.

Lawmakers have for years resisted enacting gun-ownership laws that might prevent the lowest forms of human life from getting their hands on weapons. Psychos should never be entitled to firearms. Obama believes that responsible gun owners would agree with that.

I do, too.