Lesson time once again. If you check out the listing for Pumpernickel in the dictionary the first definition is:
a dark coarse sourdough bread made of unbolted rye flour
However when you look at the etymology of the word and it’s origins, it is actually based on two german words. “Pumpern” means to break wind and “nickel” means goblin or devil. So together they mean “Devil’s Fart.” Think about that next time you buy a loaf.
If interested check out this Snopes article which discusses another widely accepted but not as accurate origin of the word involving Napolean and his horse.