Khloe Kardashian wanted to "punch" Scott Disick because of his "depressed, negative energy".

Khloe Kardashian

Khloe Kardashian

The 31-year-old reality star lashed out at her sister Kourtney Kardashian's former partner in a conversation with his ex-girlfriend and their other sister Kim Kardashian West, accusing him of playing the victim and not making an effort during a dinner thrown in memory of their late father Robert Kardashian.

She fumed: "He's the most negative, depressed victim. He acts like he tries so hard to actually play it straight for even a month, but then he comes and plays this victim.

"How are you trying? I was like, 'Scott I want to punch you in your f***ing jugular because of your depressed, negative energy.' "

Kourtney initially tried to defend Scott, the father of her three children, Mason, five, Penelope, three, and Reign, 17 months.

She said: "But he's depressed".

In a clip from an upcoming episode of 'Keeping Up With the Kardashians', Khloe replied: "He's not making an effort whatsoever to come to mum's with a little smirk on his face."

Kourtney then added: "He's like, 'I lost my whole family, I don't have any siblings.' "

Later, in an interview on camera, Khloe admitted she thinks Scott - who was dumped last July after nine years with Kourtney - needs to be more "accountable" for his actions and to make more of an effort with her sister's entire family if he is serious about winning her back.

He said: "I totally get that Kourtney and Scott's relationship is a work in progress, but Scott needs to be more accountable

"He tends to shift the blame all the time and if you want a relationship with us and you want a relationship with this family you have to try as well."