Blac Chyna in Miami, Florida on May 16, 2016 Credit: VEM/FAMEFLYNET PICTURES

Don't mess with Blac Chyna! The expectant mom hit back at haters who criticized her pregnancy weight gain on Instagram on Tuesday, May 17.

The former model, 28, who's pregnant with fiancé Rob Kardashian's baby, issued a blistering smackdown to body shamers who slammed her growing baby bump in the comments on a photo post on @thacelebriteanews account.

"To all you people out here with negative comments and insecure words (obviously because you have nothing else to do but criticize the next) I AM HAVING A BABY!" she wrote. "Exactly what do you expect to see?! If I walked out in makeup and heels everyday to be beautiful to you means I WOULD BE MISERABLE AND UNHAPPY which are two vibes I refuse to transfer to my little one."

#BlacChyna stepped into Tha CelebriTea to let you guys know to put some RESPECK on her name

A photo posted by News With A Side of Tea (@thacelebriteanews) on

"If I comment on y'all pics and go in on them tired ass weaves or unblended ass contours I'll be wrong right?" she continued. "It'll be tragic! So stop playing & Put Some Respeck on my name."

Us Weekly confirmed on May 6 that Kardashian, 29, and Chyna are expecting their first child together. She is already mom of son King Cairo, 3, with ex-fiancé Tyga (who split with Kardashian's half sister Kylie Jenner earlier this month).

The reality star is clearly a fan of his fiancée's pregnancy curves. On Tuesday he posted an Instagram photo of Chyna wearing a cutoff top that exposed her baby bump and captioned the snap, "My beautiful babies in Miami."

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