The easiest way to summarize and define hardcore club hip-hop rap music: "Nigga-This-Fuck-That Music" as in, you will likely hear those phrases in this music. Contrast with pop / top 100 "dance music" like you typically get from Akon, Lady Gaga, Katy Perry, etc.
The tiny particles of crud that are left on the bar, desk, or counter top when you are done checking "scratcher" lottery tickets. Named after the fact that most instant lottery tickets are losers, as are most people who count on them for a source of financial existance.
Angie wiped up the bar after Bob left.
Spilled beer, cigarette ashes, some loser dust, and 50 cents in change that wouldn't buy Bob another draft or scratcher. "fugging drunk loser asshole" she thought.
Giving credit for something, usually a line of dialogue, use of a word in a particular situation, or a concept. Giving props to the person you just quoted. Popularized in 90's Usenet newsgroup lingo, still used occasionally by old schoolers in the know.
so I said to him, 'if you ain't talkin' to me, who the fuck are you talin' to?" ($1 DeNiro)
Screw you guys, I'm goin home. ($1 Cartman)
So of course, while the car is stalled in the intersection, don't I get cited for obstructing a fire truck. ($1 Murphy's Law)