Chelsea Handler's Ass Shot ... Take That, Kim K!

If Kim Kardashian made the Internet explode with her ass photo ... Chelsea Handler just made the rubble bounce.

Chelsea posed sans oil, and as far as we can see it's not Photoshopped ... which makes it extremely impressive.

Handler is making her body parts a name for themselves ... she went to war with Instagram last month after they took down her topless photo mocking Vladimir Putin.

Did we say she has a nice ass?

Chelsea's going in on IG again -- she just REposted her topless Putin shot with a caption questioning why the app is cool with shots of Kim K's bare ass (and Chelsea's too) ... but not cool with her exposed boobs. She added, "I'm just so confused."