Tracy Morgan's savage joke about Rob Kardashian

It's been well documented by the Kardashian's and Blac Chyna that Rob is on a weight-loss journey, and good on him!

Though hopefully the bro won't be deterred from that journey by a savage joke Tracy Morgan's made while on The Ellen DeGeneres Show.

The comedian and actor was having a pretty frank discussion about wanting another baby saying, "When we move in, we're gonna have another baby. We're starting tonight."

And without being asked, the father-of-four said: "You gotta understand. For a whole year, I was on the couch. I couldn't do nothing. So, when everything was working, I went crazy. Our sex life is so hot. It's like volatile. We role play — that's how we keep it hot."

And this is when Blac Chyna and Rob Kardashian are brought into the convo:

"Tonight, she's gonna dress up like Blac Chyna and I'm gonna put on a fat suit and be Rob Kardashian."

Ouch Tracy!!