Potato chip. Usually round, or sort of round, and crunchy, and salty, and greasy, and edible... according to some people. Considering the consistency of a brain, I would think a potato chip quite sufficient for slicing through it.
Because it's somewhat insulting to have your sword thought to look like a potato chip. Not to mention rather funny...*lol* (Must. Not. Laugh. ) At least at this hour.
Yup. I'm implying that it's every bit as sensible to call my sword a carrot as a potato chip. For that matter, you could call it an egg if you felt so inclined, and it would make just as much sense.
*pins her down with potato chip* You see, after the aforementioned episode, Ben decided the only way to prevent future occurences of like kind was to end all wars permamently... hence the pacifism...