Kim Kardashian — ASS SELFIE … It’s Big & It’s Back

Breaking Butt Kim Kardashian“s gargantuan ass is back in working order … and last night, she let the world know … with a backside selfie on Instagram

It”s the first butt-selfie Kim”s taken since giving birth to Kanye West“s baby North back in June.

Kim”s been on a serious sexuality kick lately — on the most recent episode of her reality show, she talked about wanting to pose NAKED asap … saying, “As soon as I get in shape, the first thing I want to do is Playboy or some nude shoot. I just wanna walk down the street fully naked.”

Looks ready to us.