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An alleged Brooklyn gangbanger accused of helping rapper Cardi B unleash a beatdown in a Queens strip club last year was busted on new charges Thursday — for selling more than $12,000 worth of crack, federal prosecutors announced.

Jeffrey Bush, who allegedly served as “muscle” for the hip-hop star during the club brawl, was arrested Thursday morning at his Williamsburg home — where authorities say they then found a bag “believed to be crack” along with pills, pot, a scale and nearly $15,000 in cash, according to court documents.

The arrest followed a joint bust by the feds and NYPD.

Wearing a red T-shirt and high-top sneakers, Bush pleaded not guilty at an arraignment Thursday afternoon in Brooklyn federal court and was held without bail — with prosecutors arguing that his connection to the “Bodak Yellow” rapper made him a “flight risk.”

“Based on the defendant’s profit from just the crack sales … as well as the celebrity connection with [Cardi B], he has myriad means at his disposal to enable his flight,” a detention memo states.

Bush — who prosecutors say is a known member of the 5-9 Brims Bloods street gang — is accused of hawking a total of 280 grams of rock in Williamsburg at least six times between February and April, prosecutors said in court documents.

During one of the alleged drug deals, Bush brought a young child along with him, according to the court papers.

In another incident, he’s accused of cooking crack at a meeting with a “supplier” at his pad — while two young kids were home, according to the court docs.

Last August, Bush was rolling with 26-year-old rapper Cardi B and a crew at Angels Strip Club in Queens when they allegedly hurled bottles of Champagne at two bartender sisters — one of whom she allegedly thought was sleeping with her husband — and slammed one of their heads into the bar, authorities said.

The hip-hop star and Bush have both pleaded not guilty to charges including attempted assault, harassment, conspiracy and criminal solicitation. The case is pending.

Bush is due back in court on the drug charge on Sept. 10.