Rob Kardashian appeared to subtly hit out at ex-girlfriend Adrienne Bailon - who claims dating him hurt her career - by retweeting a message from sister Khloe which reads 'FDB' - an abbreviation for slang term 'F**k dat bitch'.

The 'Keeping Up with the Kardashians' star appeared to respond to the singer-turned-talk show host's claims that dating him hurt her career by retweeting a message from sister Khloe Kardashian reading 'FDB' - an abbreviation for slang term 'F**k dat b***h'.

Khloe tweeted the jibe on Wednesday afternoon (30.07.14) just hours after sister Kim Kardashian, 33, leapt to Rob's defence and scolded Adrienne for kicking their sibling - who has been battling depression over his substantial weight gain - "when he's down".

The former 3LW singer, who dated the reality TV star for two years from 2007 to 2009, recently gave a tell-all interview in which she accused Rob of cheating on her and claims that appearing on the famous family's E! show had a negative impact on her career as a singer and actress.

She said: "To be stuck with that Kardashian label, that was so hurtful to me and to my career. I probably realised that too late - not that it would've affected my decisions in terms of who I dated, but it would've affected my decision to appear on the show."

Kim was the first Kardashian to hit back at Adrienne, tweeting: "Funny how she says being with a Kardashian hurt her career yet the only reason she has this article is bc she is talking about a Kardashian

"So sad when people try to kick my brother when he is down #FamilyForever (sic)"

Khloe, 30, later echoed Kim's sentiments and added: "thought her and I were cool SMH [shake my head] (sic)"