Oh, my, Gawd. Becky, look at her butt.

Confession: I have always wanted a bubble butt.

Alas, I have a somewhat flatter derriere. No saddlebags, and no great sag, but still. Years ago, I worked with a woman from Nigeria (shout out to Adetola!), who told how in her village, bubble butts are so de rigueur that women pad their bottoms. Butt-falsies.

platypygous
adjective [zool.]
Having broad or flat buttocks.