Sometimes sold at 7 Eleven stores and popularized by Seinfeld. Also, cute and preppy young gay men who summer on Nantucket and prefer to be, well, on top.
After going sailing off the coast of Nantucket, Trent hooked up with Brian who is a total muffin top.
Developed by me and a few friends, muffin top describes the fat that leaks over the top of a chicks pants when she wears jeans that are 2 sizes too small.