Street Translator: What is "shizzle my nizzle"?

Because it's Friday, I'm trying to avoid my traditional political screeds (that is, until properly provoked). Sometimes, as a professor of mine used to say, you need to rise above the fray. Or in this case below.

In the spirit of my "milkshake" entry, I give you "shizzle my nizzle," a popular phrase uttered most notably by rapper and Girls Gone Wild star Snoop Doggy Dogg (shizzle my nizzle, homie).

Although it's been in use for years, I've never known, or until now cared to know, it's true meaning. From Urban Dictionary,

shizzle my nizzle:
1. meaning I concur or "for sure" my african american brother
2. [definition 2 is X-rated, use your imagination!]

**Comically, a copyright lawsuit was brought in England last year over this very phrase.

Andrew Alcee, the writer for Ant'ill Mob, sued Heartless Crew for "derogatory treatment" of a copyright when they remixed one of his songs. Alcee alleged that Heartless Crew changed the meaning of his terms "shizzle my nizzle", "mish mish man" and "string dem up" to references dealing with drugs and violence, which he claimed "distorted and mutilated" his original tune.

In deciding for Heartless Crew, the Judge found that the definition of "shizzle my nizzle" and others were unclear even after consulting Urban Dictionary deeming the words of foreign origin.