Biscuit composed only of flour, water, and salt. Can be light, flaky, and edible, or cooked so long, that it becomes hard enough that it cannot be broken with hammers, cars, etc. Used in al armies and navies until the late 19th century, especially in the Civil War, and in Navies.
We recieved our tendays rations of biscuits today.
A fag who purchases the hard back cover of a book and brags about it to people who think paper back editions are not only cheaper, but less stiff. Hardbackers often live within their parents basement and play helicopter on the internet all day.
A hardbacker totally slapped me upside the head with his copy of a wizard story that is very popular while I was defenseless with my paperback edition.