Hillary Clinton dismissed millennials as “children of the Great Recession” who are “living in their parents’ basement,” according to a taped speech that recently came to light.

She also derided them for naively falling for rival Sen. Bernie Sanders’ “false promises” — including his free-college pledge that she has since adopted as her own.

Sanders fans and Trump supporters seized on the comments Saturday as the hashtag #BasementDwellers trended on Twitter.

Many of them drew a parallel to the “basket of deplorables” slur that Clinton used to describe Trump voters last month.

“Scoot over #Deplorables we Bernie #BasementDwellers are going to need some room in that basket!” wrote Kcora Jaretsky.

“I can only imagine what demeaning, condescending things she said about #BasementDwellers to her rich friends in her hidden Wall St speeches,” tweeted Jonathan Isaacs.

“We might be #BasementDwellers in your eyes, but we told you #BernieOrBust was real,” wrote Dustin Templeton. “Good luck without us in November.”

The Clinton comments came from audio of her private fundraiser at the home of former Trinidad and Tobago ambassador Beatrice Welters in McLean, Va., on Feb. 16. The recording, leaked to the Washington Free Beacon website, came to light when hackers breached an email account belonging to a campaign staffer.

“There’s just a deep desire to believe that we can have free college, free health care, that … we just need to, you know, go as far as Scandinavia, whatever that means, and half the people don’t even know what that means,” she told a laughing crowd of big-money donors.

Clinton said she was “bewildered” at the chord that had been struck by Sanders’ outsider campaign.

“If you’re feeling like you’re consigned to being a barista … then the idea that maybe, just maybe, you could be part of a political revolution is pretty appealing,” she said.

“I mean I’m still trying to understand the revolution part,” she said to laughter.

A Gallup poll released last week showed a sharp drop in voting enthusiasm among millennial voters compared to 2008, when Barack Obama captured their imaginations and pushed them to the voting booth. In September 2008, 74% of voters age 18 to 35 said they planned to vote in November, the highest number ever recorded.

This year, just 47% of that age group says they intend to vote in the presidential election — a 27-point dive in a cohort seen as critical to Clinton’s chances.

Sanders is scheduled to hit the campaign trail for Clinton this week, stumping in Iowa and Minnesota to help boost her support among younger voters.