After revealing her latest red ink two weeks ago on Instagram, Kylie Jenner is now explaining the meaning behind the mysterious tattoo.

WATCH: Kylie Jenner Gets Another Red Tattoo

"Grandmother's name in my grandfather's handwriting," Kylie posted on Instagram Tuesday.

The tattoo reads "Mary Jo" for Mary Jo Campbell -- Kylie's maternal grandmother.

Kylie's newest body art matches her two previous red tattoos. The Keeping Up With the Kardashians star also has a tiny heart on the back of her left arm and the word "sanity" written phonetically on her hip.