A dish consisting of some sort of sausage or frankfurter wrapped up in some sort of breadlike thing, with a fairly wide choice of details.

At IHOP, "Pigs in a Blanket" consists of spicy sausage links wrapped in pancakes. (The sausages and pancakes are cooked separately on the same grill.)

In my family's cookbook, "Pigs in a Blanket" are served exclusively on New Year's Eve. They're made by wrapping small hot dogs (cocktail weiners) in the refrigerated dough sold for making croissants, then baking the dough-wrapped hot dogs in a toaster oven.

I'd be curious to learn where the name comes from; it sounds unusual enough to my American ears that I'd guess it could be British.