BB any time you have to break a joke down like a fraction...forget itwell this is how you know its a "black" joke (someone black came up with it joke)...
okay so let me break it down for ya. I don't know if you ever been to the "hood" before but that’s what the police do to black folks in the "hood". They roll up in their police car and park. For example, like a group of black boys could just be hanging out (in a group walking or standing in front of a house) and the police will "bother" them by parking and intimidating them by just sitting in the car and watching them like they already guilty or they are waiting for something to pop off just cause they black. "Roll up and Park"
Did that make any sense? I hope I explained it well enough.
ETA: 'Boys in the hood' movie is a great example.

I'll be nice, but can't promise others will follow suit.that reallyy sucks im spanish but my hair is really coarse not like ur regular spanish girl and my friends make fun off me all the time in public not in public..... ive gotten soo use to it i dont even say anything back
