A ROLL IN the form of drug slang means a quantity of 100. So if ur your buying X or zannys or anything pill form and ask for a roll they're asking for 100 CT.
Yo Im trying to pick up a ROLL of those batmans! GETTING A GREAT DEAL!
A ROLL IS A SLANG TERM FOR QUANTITY. WANTING A ROLL MEANS YOU WANT 100. A STACK IS ALSO ANOTHER TERM USED
Yo Marty can I pick up a roll for the deal?