Miley Cyrus started it. Some believe Nicki Minaj has perfected it.
Yes, we are speaking of Twerking, the booty-gyrating dance move that's sweeping the nation faster than the cronut.
In San Jose over the weekend, One Direction member Niall Horan gave the shake a shot, much to the very loud delight of fans in attendance, most notably the young lady who can be heard screaming OH MY GOD! in the following video.
It's worth a sexy look: