Stump the chump.

For a know-it-all, I’m quite frequently (and rather easily) befuddled. For example, a reader wrote in late last week to ask if I knew why a jelly roll and/or a Swiss roll is referred to as a “Gypsy’s arm” (brazo de Gitano) in Spain and Cuba. I have absolutely no idea. However I do have a few readers in Spain, perhaps one of them would care to come to my rescue on this. Anyone?