In Danish we have a word "fagidiot" which means idiot of your field. It's the kind of things that make it impossible for someone who's been in the army to enjoy a movie if they don't use the machine gun properly or a designer to appreciate the casting in the end if the typography is not kerned properly.

The things that matter to someone who spent a lot of time in any given field are rarely the important things to anyone else.

Edit: And no it's not pronounced with a hard g but with a soft g.