Comedian Kathy Griffin lashed out at Fox News commentator Tomi Lahren after she told former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaTrump: House Judiciary should investigate Obama Netflix deal instead of his business 2020 is not a family affair, for a change Former speechwriter says Michelle Obama came up with 'when they go low we go high' line MORE to "sit down" when she called her husband a great president.

Griffin shot back at Lahren for the comments, telling the commentator to “go f--- yourself.”

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“‘Sit down, Michelle’ Tomi Lahren says,” Griffin began in a tweet earlier this week. “Oh really you dime store Barbie?”

“Mrs. Obama may go high, but I certainly won’t,” the comedian continued, noting one of the former first lady's well-known phrases. “Go f--- yourself, Tomi. You evil, horrible shell of a human being.”

Griffin’s fiery remarks came in response to a tweet Lahren shared on Monday blasting the former first lady for commending the job President Obama did in office.

"Michelle Obama said we 'had' a great president. By what measure? Not in economic growth. Not in border enforcement. Not in strength on the world stage. Sit down, Michelle," Lahren wrote to her 1.18 million followers in a tweet.

Lahren was referencing remarks made by Michelle Obama at a rally in Las Vegas.

“Here’s what we have to do,” Obama said at a rally for When We All Vote, a nonprofit initiative to register voters. “If we want qualified people that we trust, then people have to vote. Because you can’t vote some of the time and then sit out." 

“You know, we saw that happen. We experienced that. But we had a great president,” the former first lady said, referring to former President Obama.

It is not the first time Griffin has targeted Lahren.

Earlier this month, Griffin issued a similar response when Fox News allegedly reached out to her to see if she would do an interview with Lahren. 

“You and your network told me my career was over and that I was irrelevant,” Griffin said in a tweet at the time. “Now you want to interview me. Not only do I not want to waste my time with you, I’m too busy selling out shows on my US tour.”

“Go F--- Yourself,” she also added then.