It's not a just a body part, or a dance, or a movement, it's a world-wide phenomenon.
In my day the ass song was Rump Shaker, today all the girl's are posting video's shaking their asses (aka booty meat) up close and personal, for all the world to see. Mostly to Soulja Boy's song with that title. Parents must be proud. Here's a few choice selections. (Thanks Jerry.)
Booty in the basement
Close up Booty Meat
Meet Shay and her booty meat
Disney Booty Meat
Super fast Booty Meat (over 3 million viewers)
Booty and a hoodie
is this.... anything?
is this fuckin anything?
wha-?