Top Definition
Substituting the letter 'z' for an 's' in marketing, or more commonly, rap, to try to sound ultra, only the word is actually pronounced with an ssss and not a zzzz phonetically.

Synonym: Zpelling
"Did you see that sign that said Krazy Katz? That is some bad-azz zubstitution.
by DMD0cal February 04, 2010

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