The bulge of fat/skin that protrudes atop and hangs over, the waistband on a woman wearing mom jeans. Similar to a muffin top, only approx 3 inches higher. Just below the boobs, creating a shelf for the boobs to rest upon.
Wow, look at the muffin top on that girl!! No, that isn't a muffin top, Tori, its a boob shelf. She is wearing mom jeans after all!!!!!!