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Whiplash resulting from a hard day (headbanging)in a mosh pit. Usually referring to someone's neck being painful and practically immobile.
Similar to the whiplash received when totalling one's car....
Rocker #1 "Hey, how was the concert man?"
Rocker #2 "Mate, it was amazing... But I've got the mean moshlash from last night. I think I broke a vertebrae...
by Yacker777 March 24, 2009
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