Jam roly-poly, shirt-sleeve pudding, dead man's arm or dead man's leg is a traditional British pudding probably first created in the early 19th century. It is a flat-rolled suet pudding, which is then spread with jam and rolled up, similar to a Swiss roll, then steamed or baked.
Historical names for a jam roly-poly include shirt-sleeve pudding, because it was often steamed and served in an old shirt-sleeve, which led to the nicknames of dead-man's arm and dead man's leg. It is often also called roly poly pudding, following the British convention of "pudding" for a dessert or boiled dish.
Mrs. Beeton's Book of Household Management (1861) gives a recipe for "Roly Poly Jam Pudding" in which a light suet-crust is spread with jam, rolled up and tied in a floured cloth, and boiled for two hours.