The midriff of a portly to obese woman exposed by low-riding jeans and high-cut tops; found on females who have experienced a sudden episode of weight gain and have not yet adapted their wardrobe; derived from the phrase "voluptuous lump."
She's sporting that voluptulump pretty shamelessly. She needs to accept the fact that she's not a size two anymore and hit up Lane Bryant's for some moo moos while she's still got some dignity.
by Reid "Mr. Peepers" Golden January 2, 2007