The 16-year-old star revealed her fancy new body art in an Instagram photo that was simply captioned: "Coca cola."
Kylie was clutching a fizzy drink in the picture, but we can't imagine that is what people were interested in!
It is hard to work out what the tattoo is of (or whether it is real or temporary!), but the intricate design is far from subtle, as it takes up almost all of Kylie's forearm.
And she clearly loved the inking enough to show it off at dinner with her pals in LA.
For her evening out, Kylie kept things casual, wearing a black camisole and accessorised with plenty of jewellery, including large necklaces and gold and silver bracelets.
Despite giving her followers a glimpse of her outfit on the night, the Kardashian-Jenner sibling failed to confirm whether her new arm tattoo was permanent or not.
However, we have a sneaky suspicion that it will wash off....
Earlier this year, Kylie's older sister Kendall showed off an interesting finger tattoo, which was inked onto her body using a Sharpie felt-tip.
Not a bad idea just in case they change their mind!
Also this week, Kylie dined out with a mystery male and looked super stylish in heels and a navy blue dress.
Her body art was nowhere to be seen on her lunch date though, so we reckon this may just be the result of some free time yesterday afternoon with an artistic friend who knows how to make the most of a Sharpie!
What do you think of Kylie's tattoo? Let us know, as the best comment from across the website each week wins £50!
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