Haggis n. (Written also haggiss, haggess, and haggies) A Scotch pudding made of the heart, liver, lights, etc., of a sheep or lamb, minced with suet, onions, oatmeal, etc., highly seasoned, and boiled in the stomach of the same animal; minced head and pluck.
... third-story front room of the house of the shrine dwelt a Scotch artist named MacGuilp, who was a grand amateur of these pipes, and who declared that no sound in the world was so sweet to his ear as the bagpipes: they recalled the heather, haggis, and the Lothians, and the mountain dew, ye ken, and all those sorts ... — Continental Monthly, Vol. I., No. IV., April, 1862 - Devoted To Literature And National Policy • Various