By City A.M. Comment Desk Every one of us has been an email chain which is borderline unintelligible for the amount of corporate lingo thrown in there. At City A.M., we’re taking a stand and calling out the worst jargon which travels around the City faster than you can drink an overpriced pint. This week: thought leader. Offender: Thought leaderWhat does it mean?A thought leader is “an influential or innovative thinker; a person with intellectual influence over a society or group”, according to the Oxford English Dictionary, the status of which is somewhat dampened by having an entry on the eg…