Reality TV star Rob Kardashian took to his official Twitter page this morning to slam former lover Rita Ora for cheating on him "20 times" during their relationship.

His tweets have since been deleted, but the instant nature of the social networking site meant that millions of people saw the messages and had time to share them online before they disappeared (pictured below).

The pair had been dating for a while, but recent reports suggested that the couple had split and it now appears to be true after Kardashian blamed her for ruining their romance with her dishonest and 'disgusting' behaviour.

He wrote: "She cheated on me with nearly 20 dudes while we were together, I wonder how many she will sleep with now that we're apart. But I mean 20?!!!"

"How can a woman who is so busy trying to start her own career have time to be with so many dudes all while in a relationship?! I'm actually disgusted a woman could give up her body to more than 20 in less than a year's time while trying to start a career."

Following his tweets, the phrase 'Rita Whora' has made it into the Top 10 Worldwide trending topics list. Ora hasn't yet commented on the situation and instead has been promoting her forthcoming tour.

Watch Ora rehearsing for her performance on The X Factor here: