A community meeting about bike lanes in Brooklyn quickly descended into an expletive-filled shoving match Wednesday night — after Jeffrey Epstein’s name was dropped, according to a new report.

The chaos erupted at the packed meeting in Park Slope when self-described cultural and climate activist John DeLiva Halpern began speaking about bike advocacy group Transportation Alternatives, Gothamist reported Thursday.

“Their funding comes from the likes of billionaire Steve Ross, a crony of Jeff Epstein, and an elite group of backers,” Halpern said, referring to the perverted moneyman who committed suicide last month amid allegations of sex trafficking.

When the crowd burst into laughter, Halpern lost it.

“You want to clown around with me? You want to clown around with me?” he challenged the room, according to a video posted by Gothamist.

The meeting was held by Citizens United for Safety over what founder Myra Manning calls the “lawless” conditions created by the bike lanes installed last summer along Ninth Street in Park Slope.

The get-together continued to spiral out of control when Halpern began screening his film “Betrayal on 14th Street” about the controversial bus lane — with a man threatening a cyclist, “I’ll beat your ass.”

Halpern was also caught on video shoving bike activist Doug Gordon, who began reading the names of five people killed by drivers on Ninth Street since 2004.

“Yeah, I shoved him. It’s theater. We’re all performers,” said Halpern, who also flipped off a camera.

It’s unclear whether Halpern was referring to the same Ross who is a billionaire real estate developer with a stake in Equinox Fitness.

TA does not receive funding from Ross, a spokesman told The Post.

“For 46 years, Transportation Alternatives has been representing New Yorkers across all boroughs for safer streets. We believe that our city belongs to New Yorkers, not cars and parking,” said TA executive director Danny Harris. “As more residents demand transportation options, we can not let lone, toxic and misinformed voices hold up progress for millions of hard working New Yorkers.”