If rap slang sounds like gibberish to you, it just means you have to brush up on some everyday figures of speech. Very few (if any) rappers invent slang out of thin air. Nothing is random. So before you begin the quiz, here are some figures of speech you should familiarize yourself with.
You need to know what similes and metaphors are, since a lot of slang is based on those. You should know what portmanteaus are, which are words that blend two or more words into one, like brunch (breakfast + lunch) or motel (motor + hotel). Do you remember onomatopoeia? It's a word that phonetically sounds like its meaning, like splash or chomp or om nom nom.
Metonymy uses a single word to represent the larger whole it is associated with (i.e. Washington can mean the government or tongue can mean language). Synecdoche is similar to metonymy, but where metonymy uses a word that is associated with a whole, synecdoche uses a word that is part of the whole (i.e. nice wheels = nice car, boots = soldiers, and head count = person count). Metalepsis takes figurative speech and uses it for a new meaning. The classic example is using the maxim, "the early bird catches the worm," and saying "I have to catch the worm tomorrow," which means "I have to wake up early tomorrow to be successful."
Now that all of that is out of the way, let's begin.