muffin top
n.— «My father-in-law told me about a new expression he had imported from Australia to describe the roll of fat that hangs over women’s hipster jeans: “It’s called a “muffin top.” Look, there’s one,” he exclaimed, gesturing in the direction of my waistband.» —“Body Beautiful” by Lesley Thomas Daily Telegraph (U.K.) Jan. 8, 2005. (source: Double-Tongued Dictionary)