Etymology: Middle English; akin to Middle English fobben to deceive, Middle High German voppen
1) Someone whose external appearance and actions are dramatically different from their internal thoughts and emotions.
2) A charismatic person who can not or does not care about anyone but him or her self.
3) A politician.
I was startled to be unable to find this in any dictionaries, so I correct the obvious (to my mind) etymological error.