Someone that you used to be friends with, but not anymore. They may say that they are "on a different planet" from time to time. They will suddenly stop talking to you completely and you will no longer be friends. They will follow you wherever you go -even to the bathroom- and not say a word to you. They will stand outside of a conversation, listen to it, and laugh, but never add to it. Fox's are short and annoying people. They will creepily stare at you from across the room as well. You never want to be friends with a fox!
Oh my gosh, she just followed me to the bathroom! What a fox!