Someone who doesn't eat anything that came from an animal. But then again, if that were their motto, they wouldn't be "allowed" to eat vegatables or fruits or pretty much anything else, either. Because those foods are grown in manuer, which, not to gross people out, is animal crap. And, FYI, animal crap comes from animals too. So vegans pretty much don't eat anything. Except water. Which isn't a food.
Ashley: Woah, Mary Kate, your so thin, what have you been eating?
Mary Kate: Just water. Hilary Duff is on the same thing. Isn't my new 'vegan diet' just FAB?!
Ashley: Um, sure.. but I asked what you were eating.
Mary Kate: Water...