Haggis. Some would call it one of the most disgusting sausages ever created. With ingredients like sheep's 'pluck' (heart, liver and lungs), minced with onion, oatmeal, suet, spices, and salt, mixed with stock, and traditionally boiled in the animal's stomach for approximately an hour (Wikipedia)
it's not surprising people cringe at the idea of eating one. And if a "normal" sized haggis isn't enough, check this one out. A giant Haggis. Reminds me of those sand worms from the movie "Dune"!