Kylie and Kris Jenner: We Screwed Norway ... with OnePiece Frenzy

Kylie Jenner broke the Internet -- well, one small corner of it, and most shockingly ... she did it without showing any skin.

Kylie and her mom, Kris Jenner, each slipped into a Onepiece, and on Thursday posted pics of themselves rocking the super comfy look. The posts included a discount code to purchase your own directly from the company.

Now, Kris & Kylie have a combined 90 million social media followers, which as it turns out ... is way more juice than OnePiece was ready to handle. Within 30 seconds of the Jenner posts, more than 100,000 people went to its website and crashed it ... according to our OnePiece sources.

The company's HQ is over in Norway, where it was the middle of the night -- and we're told staffers had to be roused outta bed to get the site back online.