usually refers to a popular type of Lao sausage made from coarsely chopped fatty pork seasoned with lemongrass, galangal, kaffir lime leaves, shallots, cilantro, chillies, garlic, salt and fish sauce.
Another variant is known as "soured Lao sausage". It uses cooked Lao sticky rice as an additional ingredient in the filling, which is then allowed to "sour" at room temperature for a couple of days.