A federal judge on Monday told the lawyer for an indicted Russian firm to "knock it off" with his colorful and sometimes personal criticism of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE.

U.S. District Judge Dabney Friedrich on Monday scolded Eric Dubelier, an attorney for Concord Management and Consulting, over a filing from last week in which Dubelier quoted the 1978 film "Animal House" and accused Mueller of collecting a "nude selfie" as part of the special counsel's Russia investigation.

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"I thought your brief was inappropriate and unprofessional and ineffective," Friedrich said to Dubelier, NBC News reported. "You have undermined your credibility in this courthouse."

Friedrich encouraged Dubelier to halt the "relentless personal attacks" on Mueller, according to BuzzFeed News.

"Knock it off," she added.

Concord Management and Consulting is among the Russian entities that Mueller indicted, accusing them of participating in a Russian troll farm's efforts to interfere in the 2016 presidential election. The firm has been fighting court battles since May, when it pleaded "not guilty" to the charges.

Dubelier in the brief filed last week claimed that Mueller's strategy was similar to a line from "Animal House": "You f---ed up. You trusted us," according to NBC News.

The Concord lawyer on Monday accused Friedrich, who was appointed by President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE, of being biased. "There seems to be some bias in this court," Dubelier reportedly said during a heated exchange.

Friedrich called Dubelier's attacks on Mueller "meritless."

Dubelier in the December filing also accused Mueller's team of illegally keeping information from the company.

“Could the manner in which he collected a nude selfie really threaten the national security of the United States?” he wrote.

The next hearing in the case has been scheduled for March 7, according to NBC.