"fo shizzle" was made world famous by rapper snoop dogg as a replacement for the more commonly used "for sure".
"those are some stone cold rims!" friend: "fo shizzle!"
Other words can also be "izzled". For example: "What's the dizzle?" is: "what's the deal?" Try it yourself but don't get carried away 'cause you're really gonna make a fool out of yourself...
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