The 29-year-old sock designer is currently engaged to Blac Chyna, the mother of Tyga’s son, King Cairo. Tyga is dating Rob’s half-sister Kylie Jenner.
This tweet comes a month after Midler picked a fight with Rob’s older sister Kim Kardashian. After Kim posted a nude selfie online, Midler quipped, “Kim Kardashian tweeted a nude selfie today. If Kim wants us to see a part of her we've never seen, she's gonna have to swallow the camera."