"for shizzle"

Where I grew up we used "init" to mean "isn't it" but "donit" to mean "doesn't it". Some people at uni seem to use "init" to mean both.
Sometimes they just use "init" to mark the end of a sentence.

I've got a mate who reckons there is a "lush" place called "Brizzle" but I've never heard "for shizzle"

Ron Atkinson the EX-soccer pundit was the last person I heard use the word "nigga" in Britain. Hence the "EX".

"Nigga" is how speakers of African American Vernacular English typically pronounce "nigger" which is a racist term for a black person. However, Blacks in America typically use this as a term of endearment when speaking with one another. Don't ask, we don't understand why that's ok either.

"For shizzle" was a slang made popular by Snoop Dogg where you throw the syllable "izzl" into basically any word... So "That shop is whack" would be "That shizzle is whizzle." It's ridiculous...

You could say "for sure" to mean "definitely" or "of course" in most contexts in America, but I wouldn't say "for shizzle."

it means a black person.
they find it very offensive if a whit person says it to a black person.

Nigga is derivate from Negro.

A derivation, rather.