1. A crisp, flat muffin that resembles the top portion of a typical muffin
2. Slang: A roll of excess fat that hangs out over a person's waist when wearing a garment with a tight waistband
|Never a good look... (source)|
Muffin top, specifically, is first attested in 1914 in reference to the top of an actual muffin. The slang term, depicted above, is not recorded until 2003. Perhaps it is no accident that back in 2003 low-waisted jeans and midriff-baring shirts were, unfortunately, in style at the same time.