Well as long as we can be picky about it, I could give up my lower left leg, cut off no higher than mid-shin. Or would that be two body parts since there's a foot attached to that leg? Or three if you count the toes as one?
I figure, if someone can climb an impossibly high mountain with a fully prosthetic leg, then I can learn to manage with a prosthetic leg end and foot. As long as I get to keep my arms and hands with their pointy ends, I'm fine