While listening to a podcast from the New Word Open Mic event at the Dictionary Society of North America meeting, I heard the neologism crappyjack as a synonym for junk food. Anything you snack on that leaves you with a hollow feeling could be crappyjack, which comes from crap plus Cracker Jack (an American snack food of peanuts and caramel-coated popcorn, for those outside of its reach).
This seems like a fine word to use for the low-nutrition, high-calorie junk food that transports high-fructose corn syrup to our bodies, so I post it here for all of you to spread to the masses.