Short for "rolling papers", thin sheets used to roll joints, generally of marijuana.
"I'm broke as fuck and I don't get paid til the first of next month.
But if you care to join me, I was about to roll this next blunt.
But I don't got no weed, no Phillies, or no papers.
Plus I'm a rapist and a repeated prison escapist..."
-Eminem ("As The World Turns")
papers can refer to marijuanarolling, immigration papers and other legal documents, and money a.k.a. cash
C.J. from Grand Theft Auto: San Andreas
"Eh Yo gimme datpaper!(c.j.sometimes says this after he has shot the person, killed him/ her, and taken their money.
Documents necessary to pass into another country or legally live there, such as a passport, visa, or green card.
Fred: "Dag dogg, I can't believe El Rodeo shut down. What's up with that?"
Billy: "Yeah, you know that dirty guy Jose that runs the place, that dirty Mexican...they deported his dirty ass."
Fred: "Man everyone knew that dirty wetback didn't have papers. What a shame. That joint had good tacos."
Billy: "Word."