Rob Kardashian Blac Chyna out to birth the "next generation of the Kardashian name!"

Rob Kardashian posted in his Instagram the pic of BC carrying a baby car seat and saying she's out to birth the "next generation of the Kardashian name!"

It's a hardcore troll of Kim, Kourtney, Khloe and Blac Chyna's nemesis, Kylie -- especially since we know Rob's friends and family aren't happy about his hook-up with Chyna. 

Funny to us ... but not so much for the sisters, we're betting.