After Miley Cyrus' performance at MTV's Video Music Awards, even my mother had heard the word 'Twerking'. I had many friends even looking the word up:

Twerking: The rhythmic gyrating of the lower fleshy extremities in a lascivious manner with the intent to elicit sexual arousal or laughter in ones intended audience

It's gotten to the point that people (mainly young girls) are videotaping themselves twerking and posting them online, like this young lady who is absolutely on FIRE...literally!