how to twerk and what is twerk?

Twerking, the act of thrusting one's buttocks rhythmically, is here to stay. If you want to learn how to twerk, we scoured the web for the most ridiculous videos of twerk-aholics for your education. While some will say that twerking is a passing phenomenon, the truth is that twerking has been with us since the dawn of mankind and it's not going anywhere. It also appears that twerking isn't just for humans, or for people who can do it safely and responsibly, which is probably a good thing for everyone on the internet. Learn how to twerk (and how not to twerk) from the following videos. 10. Girl Catches Fire While Twerking 
How have you not seen this?
9. Football Player Twerks on Opponent This is actually hot.