Kim Kardashian claims she's been violated by an inflatable sex doll ... one that looks suspiciously like her ... and even shares her first name -- and now the real Kim is out for revenge.

It's all over the "Kinky Kim Filthy Love Doll" -- described on the box as a "busty bubble-butt bimbo who's had more dark meat inside her than a bucket of fried chicken."

For some reason -- Kardashian believes the doll is modeled after her -- thus violating her right of publicity -- and now her lawyer, Shawn Chapman Holley, is on the attack.

Holley fired off a strongly worded letter to Pipedream Products, Inc. -- the company behind the sex doll -- demanding they stop production ASAP before she opens up a big, fat can of lawsuit.

But Pipedream, unlike their products, doesn't plan on just taking this lying down -- telling us, "The similarity between the Kinky Kim doll and Ms. Kardashian is purely coincidental."