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2.
Condition which results from extensive play sessions of Guitar Hero typically over the course of a few days.
The "raw" feeling one gets on the tips of the pointer, middle, and ring finger on their left hand.
In extreme cases of Guitar Hero Finger one or a few blisters may develop.
"Man, I can't even type right now. Had a party over the weekend and I got a serious case of Guitar Hero Finger."
af Ebisch? 13. april 2007
 
1.
from playing guitar hero excessively and having the joints in your fingers are sore and stiff and hard to move.

another side effect from guitar hero is
guitar hero tripping
guitar hero enthusiast: my god freebirds a bitch!
gave me guitar hero fingers, ouch!
af BE_PREPARED! 21. august 2007