"R.I.P." to Rita Ora and "Keeping Up With the Kardashians" star Rob Kardashian's short-lived romance. After professing their love for each other on Twitter back in June, the pair have reportedly called it quits ... and their love affair didn't seem to end on a good note.

In a series of deleted tweets (presumably about Rita) that Rob posted this morning (Dec. 3) and were captured by a fan here, Rob wrote, "She cheated on me with nearly 20 dudes while we were together, I wonder how many she will sleep with now that we 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 dudes in less than year's time while trying to start a career."

The tweets were reportedly live for 30 minutes before Rob decided to take them down. Fans quickly noticed, and "Rita Whora" became a trending topic on Twitter afterwards, according to E! Online.

Sister Khloe Kardashian also noticed Rob's outbursts, and tweeted to her brother, "Rob be nice kiddddd." She also added, "Social media is so much drama. Hehehe thank goodness there was no social media when I was younger. Too much drama in the LBC."

According to U.K.'s Daily Mail, Rob was supposed to celebrate Rita's 22nd birthday in London last week but never appeared, fueling breakup rumors.

Rita hasn't tweeted anything cryptic in return, and her rep declined to comment to the newspaper.

See Photos of Rita Ora's In House Visit With The BoomBox

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Watch Rita Ora's "R.I.P." Video Feat. Tinie Tempah