I coined a new term today that follows in the fine tradition of Douglas Adams & John Lloyd's wonderful 1983 book, The Meaning of Liff, and Rich Hall's Sniglets.
fauxpert
noun: a person who can fake expert-like knowledge on a topic in everyday conversation.
Example: "Despite not being able to point to either city on a map, Ian was such a convincing fauxpert that Jessie is now going to Binghamton instead of Brussels for vacation.
Holy crap i love that word! You know you are usually my walking dictionary anyway. That's a great one!