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1. Zetta slow
Particularly slow. Often used in an insulting manner.
"So zetta slow!" Shô Minamimoto (The World Ends with You)
2. zetta slow
Slowness multiplied by 10^21.

A term used by the character Sho Minamimoto in the Japanese role-playing game (for the Nintendo DS) The World Ends With You.
Neku Sakuraba is so zetta slow.
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