A psycological disorder, similar to Schizophrenia or Tourette syndrome, in which one believes they are the fantasy character Gandalf. This person may do things like appear in your home with thirteen dwarves, or can be heard whispering under his/her breath such things as, "Run, you fools."
There are two basic stages of this complex, the primary stage, 'Grey,' and the secondary, 'White.'
"I knew my husband had a Grey Gandalf Complex when he brought the Fellowship into our vacation home, referring to Point Pleasant as 'Middle Earth.'"
by King Théoden August 19, 2008
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