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NKZ means, if you're slow, no kill zone.

NKZ can generally be found in the description of a MSN knock-off roleplaying chat, if the hosts don't want you to go around kicking ass.

Description: Feudal Japan | Night Time: Clear | Peaceful village with villagers working. | 18+ Description and TB preferred. (Nkz without gold permission)
by Brittany Olson June 28, 2005