My Ass: (Exclamation) A way of expressing disbelief or bullshit.

In the above clip, Kim Kardashian along with her sister "Garfield's Slutty Cat Girlfriend" Kardashian try to settle the dumbest pissing contest ever, by proving that she fits into size 27 jeans after a claim she made on her blog sparked "controversy."

I am a size 27 jeans... My measurements are 34, 26, 39. But remember I am 5'2" and 1/2 and everyone carries their weight in different places.

My body frame is small, but since I have curves, many people assume I am bigger and wear a bigger size in jeans. This is simply not the case! The misconception carries over to my weight, too. I am right under 120 lbs, but a lot of people have been shocked to hear that and have accused me of lying! Haha. (Source)

In Kim's defense, I am the same height as her and I also wear size 27 jeans. But since my ass doesn't resemble a Weeble Wobble, (they wobble but never fall down!) my daily dressing routine involves significantly less heaving and jumping up and down. Hell, with enough struggling and lube, I could probably tell people that I fit into jeans from BabyGap -- but at the end of the day I'd only be lying to myself. And Jesus hates liars. Of course, Jesus also hates girls who let themselves get urinated on by black dudes on camera, so the lying stuff is really the least of Kim's concerns.

Exhibits A through Badonkadonk: