Meow! The claws have been out for quite some time, and Kylie Jenner and Blac Chyna just can't stop fighting via social media!

Last night Blac Chyna posted the pic above, and while she didn't caption it, she doesn't really need to. Kylie, 17, is currently dating Blac's ex/baby daddy, Tyga, 25, but what she's really famous for these days is her ridiculously large lips, which she can't seem to stop posting pictures of.

Though Kylie denies that she's had work done, she's clearly doing something to her pout, and young girls all over the world are trying to copy the plumped up pucker with the #KylieJennerLipChallenge. We haven't tried it, but apparently if you suck on a shot glass long enough, it puffs up your mouth -- and as an added bonus, you might burst a few blood vessels.

We're pretty sure Kylie's not doing that to achieve her look, but she has to be doing something, right? But after being made aware of the dangerous new trend being publicized on social media, Kylie tweeted on Tuesday, "I'm not here to try & encourage people/young girls to look like me or to think this is the way they should look. I want to encourage people/young girls like me to be YOURSELF & not be afraid to experiment w your look."

Kylie previously said in an interview with Grazia, "I haven't had plastic surgery ... I've never been under the knife. People flashback to pictures of me when I was 12 and say 'Kylie's so different,' but how can I look the same from 12 -18?"

Of course, we love Blac's picture -- not only is it making fun of Kylie's overly plump pout, but it's definitely mocking her obsession with posting selfies. Last month the ladies got their g-strings in a bunch when Blac posted a pic of herself wearing a Audemars Piguet watch, which was a gift from Tyga back in 2013. Just five hours later Kylie Instagrammed a photo of herself wearing the watch and wrote, "Currently."

Well, until Tyga knocks Kylie up, Blac is winning this pissing contest!