Rob Kardashian has yet to make an appearance on the new season of E!'s Keeping Up With The Kardashians, but he had a few words about show star and his sister Kim Kardashian.

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He took to his Instagram page to express his disdain for his older sister. He tapped a dramatic scene from Gone Girl in which Amy Dunne (played by Rosamund Pike) returns home after faking her own kidnapping.

In the snapshot Amy is covered in a bloody dress just after she killed her childhood friend (Neil Patrick Harris) in hopes of framing him as her capturer.

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Rob captioned the snapshot Sunday, "This is my sister Kim, the b**** from Gone Girl,,,"

 This is my sister kim , the b**** from Gone Girl,,,

A photo posted by ROBERT KARDASHIAN (@robkardashian) on Mar 22, 2015 at 10:38am PDT

It's not clear if the two are beefing but interestingly enough, Kim showed Rob love for his birthday on March 17, less than a week before his cryptic message. She wrote, "Happy Birthday to my one and only brother Robbie!!!! I remember this Vegas party of yours like it was yesterday! I love you so much and can't wait to share so many more memories with you! Kiki Riki!!!! "


Kim has yet to respond to Rob's post publicly.

But an insider said that his picture shouldn't be taken too seriously.

They told People magazine Monday, "He has a funny sense of humor and posts weird things and then deletes them. It's just him..."

Still, they added that some of the family is a little worried about him, especially with his recent weight gain.

"He has always been this way. He just can't lose the weight and he doesn't try - just sits around."

Keeping Up With The Kardashians airs Sundays at 9/8c on E!

Tags: Keeping Up With The Kardashians Reality TV E!