Panna Cotta Ass
An ass that is (like a panna cotta) silky, smooth, shapely and has a perfect jiggle, however, (like a panna cotta) has a serving size that is unsatisfying.
"Wow, Julie is flawless."
"That's what you think... unfortunately she has a panna cotta ass."
"That's what you think... unfortunately she has a panna cotta ass."