Kendall Jenner, Khloe Kardashian Inspire #ThighBrow Trend

We"ve seen many fascinating Instagram trends come and go during the social media site"s relatively short history.

No makeup selfies were all the rage for a while. We"ve seen the rise of Man Crush Monday, Woman Crush Wednesday and Throwback Thursday.

We"ve even seen people pose with food that they couldn"t possibly eat.

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But leave it to a Jenner and a Kardashian to inspire not only a new trend, but a new word. Someone call the folks at Webster"s, because we need "thighbrow" in our dictionaries, ASAP.

In case you were wondering the thighbrow is that crease peaking out of Kendall Jenner and Khloe Kardashian"s swimsuit bottoms.

No word on if they started the trend on purpose, but knowing the Kard clan we wouldn"t put it past them.

In the three weeks since that photo was posted "#thighbrow" has become a popular hashtag, and naturally, Kylie Jenner had to raise the bar by executing the first standing thighbrow:

Truly, the student has become the master. Stuff like this is why Kylie is more popular than her sisters online. She thinks outside the box, ya know?

Anyway, the thighbrow trend will likely fade from memory in the very near future, but now matter what happens, at least it"s not as dumb as waist training.