When a member of the Kardashian-Jenner family has a birthday, low-key isn't exactly the word we'd use to describe their celebration.

True to form, Kylie Jenner's 21st birthday was anything but low-key.

Mashable Top StoriesStay connected with the hottest stories of the day and the latest entertainment news.Sign up for Mashable's Top Stories newsletterBy signing up you agree to our Terms of Use and Privacy Policy.Thanks for signing up!

SEE ALSO:Dictionary.com didn't throw shade at Kylie Jenner. It actually made an important point.

Kylie posted a shot of herself with Kendall, Kim, Kourtney, Kris, and Khloe, in which they all put their middle finger up at the camera.

View this post on Instagram

How rude. Happy birthday Kylie!

---

Featured Video For You

---

Kylie Jenner's Instagram posts are worth millions

---