What are the flaps mentioned in some lower body lifts?

I was reading up on lower body lifts -- maybe to get one but probably not -- and the testimonial that I was reading mentioned flaps. I can't seem to find enough info of these flaps online. Could you fill in this info gap for me so that I can understand what she is talking about?

KellyAnne

F, 47, Arizona

Tags:woman age 45-54 thighs lift