No, she's not putting down skinny girls. It was a bit tongue-in-cheek (probably because people expected her to do so in that type of song):

I'm bringing booty back
Go ahead and tell them skinny bitches that
No, I'm just playing. I know you think you're fat
But I'm here to tell ya
Every inch of you is perfect from the bottom to the top

Edited By: RandomA1 12/07/2014 3:07 PM. Edited 1 times.