Uh oh, it would seem Kim Kardashian took things a step too far during her Rolling Stone interview recently, after she claimed her brother Rob Kardashian 'smokes weed and drinks beer all day long'.

“Rob and Kim had been cool again and were getting along,” an insider told Us Weekly.

“Now he’s furious at her again for her comments to Rolling Stone. He was been bitching her out on her phone. He’s mad — pissed as hell."

If you're wondering just what was said, allow us to remind you:

“It’s not that mysterious, what’s happening with Rob," Kim told RS on the subject of her brother's health.

"He has gained weight. He feels uncomfortable being on the show, and that’s OK. Do I think he smokes weed, drinks beer, hangs out and plays video games with his friends all day long? Yes.”

Ouch!

“Rob has blocked Kim on his phone,” the source continued to tell the publication.

“He doesn’t want to hear what she has to say. He says there’s no excuse she could possibly have for saying that. He will not forgive her."