A white-skinned, white-fleshed sweet potato with starchy, Irish Potato-like texture, but the intense sweetness of your more common orange sweet potato.
The seconds/blemished sweet potatoes are gnarly, holey, or just ugly, and needing a good home where they can be loved and appreciated for who they are :) Parts of the potatoes are to be discarded, but you will find yourself able to use most of what you receive, by far.