Farrah Abraham has come under fire after she lashed out at Blac Chyna with a racist comment on Instagram.

The former Teen Mom star wrote a bizarre, seemingly unprompted comment on Blac's account on Friday.

'F**kin monkey ewe s**t come up 4 what she is a nothing,' the 24-year-old wrote after Blac shared a video showing off a new lace choker.

Nasty comment: Teen Mom OG star Farrah Abraham lashed out at Blac Chyna with a nasty, racist comment on the model's Isstagram account on Friday

Bizarre attack: The adult film star made the mean comment seemingly out of the blue

But Farah deleted her attack after it set off Blac's fans, who were quick to come to the beauty salon owner's defense.

'Before you degrade somebody else don't forget where you came from,' wrote one commentator.

'Not knocking you but you were Teen Mom, and then became a pornstar or if that's what you like to call yourself! You are no better than anyone, and for you to say something so degrading and so nasty just shows what kind of person you are!'

Many of the NSFW comments pointed out Farrah's own humble beginnings and adult film career, and urged her to set a better example for seven-year-old daughter Sophia.

Music video model Blac, 27, has been in the spotlight since her surprise engagement to Rob Kardashian, 29.

The attack is not the first time Farrah has lashed out at celebrities on social media.

Social media spat: Farrah wore a black bodysuit over a pink skirt as she attended a meeting in New York on March 18

The Nebraska native took a shot at Nicki Minaj, after the rapper tweeted 'Farrah is a c*** to her mother' while watching a Teen Mom rerun in January.

The Pinkprint rapper then retweeted a comment joking about Farrah's porn career and her daughter Sophia.

Farrah tweeted back: 'Cause your (sic) a parent right? Your (sic) videos look like porn Horrible good luck being negative #Godbless busy making TV.'

Team Blac: Farrah's comment was quickly slammed by fans who jumped to Blac's defense and urged Farrah to be a better role model for her daughter

And Farrah dissed Blac's future sister-in-law Kim Kardashian last month, claiming she's 'surpassed' the reality star.

'I've been beating out Kim on a lot of things' the MTV star told the Nik Richie Podcast.

'I think I've surpassed her in certain aspects,' she went on, adding: 'Then again, I conduct myself and my brand in a different way and my life in a very different journey.'

'I think I'm doing very well, if not better.'