urbandictionary.com

pretty much throw yourself out there and see what you can pick up on., but please for the love of whom ever created you, don't go participating in the smash and grabs okay?

I'm a full-on native and I struggle...my strategy is to wander around like a doddering old man misusing the words until one of the kiddos takes pity upon me and explains what 'chewin' means

Do you mean to understand African-American language? Urban Dictionary is a good source. Or you can just look up "Ebonics" or "hip-hop slang" I suppose...?

There are some lyrics websites like songmeanings.com or genius.com that explain the lyrics. They might be helpful for that.