gnack gnack : melon/skull/head/back of the neck/forhead/face.
-- but only called this when you pull a retarded maneuver to actually fall on your skull..
ie: when i dropped in from the top of the over vert cradle in scarnation skate park i fell straight to my gnack gnack..
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- A Complete f'ing moron who makes bad judments and pays the penalty for his mistakes by physical damage
Dipshitsu dropped in on the over vert part of the skate park only to fall straight to his gnack gnack <-see gnack gnack in urbandictionary.
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