So perhaps you are a bit on the mature side, and haven't hit a club in a while. But you heard about Miley and "twerking" and you didn't want to look dumb. And maybe you found yourself sheepishly Googling the term, and are still a bit confused.
Turns out, there are plenty of instructional videos out there, including this excellent in-depth clip from Howcast. Or this one from Keaira LaShae. Enjoy, and get twerkin'!