gandouche
A combination of gandu, a Hindi word for an asshole or idiot, and douche, a shorthand for douchebag.
That guy is a gandouche.
Gandouche
An insult pertaining specifically to anyone who thinks they are awesome because of their knowledge of Lord of the Rings, Dungeons and Dragons, or any other fantasy/mythical information.--combination of Gandalf and Douchebag
That guy is such a Gandouche