The, in fact, unenjoyable fat that hangs over
the way too tight
pants of a hefty lady. Therefore, giving a relation
to the top of a muffin. Also possible to be a noun, example below. (A.K.A. Jessica)
"WHOA, don't look now, it's Muffin-tops in Spandex, why does she put herself
and everyone else in harms way wearing stuff like that?!"