A sausage of sorts, haggis consists of minced "sheep's pluck" (heart, liver and lungs) combined with oatmeal, suet and spices and boiled for hours on end inside a sheep's stomach. Revered in its native land and even immortalized in a poem by 18th-century bard Robert Burns, "Address to a Haggis," the peculiar delicacy has never caught on outside Scotland, inspiring centuries of mirth instead.
One traditional joke, possibly instigated by the Scots themselves, has it that haggis is actually a type of wild beast hunted on the moors like grouse or rabbit. Many foreigners believe this, apparently. A recent poll found that one-third of Americans are convinced haggis is a creature; a fourth believe they'll be able to sign up for a haggis spotting expedition if they ever visit Scotland.
My advice to these credulous folks: stay closer to home and stick to more familiar prey jackalope, for example; or snipe.
And best o' luck to ye, 'cause ye'll need it.