Coolio - a little help please

Okay, so I get some of it, like all of it. But:

Mama I’m in Love
Drop fucks? Best guess, prison lap fucks.
“Now he’s wearin the fuckin Lexus like a necklace.” What? Car crash is the only thing I can think of.

Can-o-corn
“Where he has to live in the shadow of a base-pipe.” Base pipe?

Smokin’ Stix
What’s a “stick”?
“You know karate, I no rizzeign.” rizzeign?
"and I can’t cope without my Smith " Smith?

I’ll continue to enjoy it anyway, but I’d like to be certain what I’m listening to. There’s bound to be loads of others that I’ve forgotten, so anything related is appreciated.

Well I found this:

http://www.urbandictionary.com/define.php?term=drop-fuck

and “Smith” - could that be a “Smith & Wesson” ?