The irrational fear of travelling virtually anywhere due to fear of locational germs, illnesses, parasites and dangers both real and exaggerated. Similar to agoraphobia in that sufferers limit the scope of their world, but more specific in that the nature of the perceived threat is directly related to any foreign location.
Watching the Amazon episode on "The Monster in Me" led to Will's increasing Geographobia.
"So do you think Laurie will go on the camping trip?"
"No, she won't even leave Scranton, she's so Geographobic."