a bulging pussy is one thing, and can be hidden under clothes...

From the Urban Dictionary:

muffin top: The abdominal spillover that results from a husky woman wearing a too-tight pair of low-cut pants.
"Sweet Jesus! Look at the muffin top on that deuce."

muffin top: The roll of fat that hangs over the top of too-tight, low rise jeans.
"When looked at from behind, from the waist down she looked like a muffin top."

muffin top: When your love handles burst out over the top of your tight pants, giving your lower back/butt the appearance of a muffin.
"Man Look at Joanie over there with those skanky jeans on, she sure has a wild case of muffin top."

muffin top: A word used to describe one whos fat is desperately trying to escape the suffication from tight jeans resulting in the fat tumbeling over.
"Shayna is such a fatass look at her muffin top!"

muffin top: The roll of fat that slumps over the waistband of too tight lowrider jeans.
"That girl is cute but look at that muffin top."

I also saw some microwaveable Muffin Tops in the freezer section of the grocery store. Much more appetizing than fat rolls.