Twerking is really having a moment right now.
On Wednesday, Aug. 28, Oxford Dictionaries announced that the booty-popping dance move would be found in future publications under the entry: "Twerk, verb." Given that Miley Cyrus twerked for the world in everything from a unicorn onesie to flesh-colored, latex lingerie at the 2013 MTV VMAs, it seems like she should be part of the definition.
But, alas, she is not. According to Oxford Dictionaries, the term twerking originated in the '90s aka back when a pre-twerk Miley was just a little girl growing up in Tennessee. The "informal" verb is defined as "[dancing] to popular music in a sexually provocative manner involving thrusting hip movements and a low, squatting stance." (Way to make twerking technical, linguists.)