Noun- The feeling of severe boredom, depression, or insanity acquired after completing a long-term goal. Often associated with investing hours in a Pokemon game, beating it, and not knowing what the hell to do next, but not limited to Pokemon.
I suffered from some serious Pokemon Master Syndrome after beating the Elite Four and getting all eight badges. I think im going to hang myself now.

After Football Season was over, I suffered with Pokemon Master Syndrome, spending mindless hours on Facebook and Youtube.
by SuperNoahZark April 1, 2011
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