Graduate to a key become a street scholar  from Murs (Ft. 9th
Wonder) – Tale Of Two Cities on Rap Genius   A scholar is
someone who is extremely skilled in one area which usually
involves graduating from college or training to be considered
one. A street scholar would be someone who is skilled in illegal
activities of the streets, in this case, drug dealing. Someone
would “graduate” to selling more quantities of a drug or selling
a drug that is worth more and become a street scholar.  A key is
slang for kilo, which is 1,000 grams and commonly associated
with cocaine. Anyone able to acquire a large amount of cocaine
like this would have to be very skilled in dealing since it is
has an estimated worth of $16,000-$24,000.  To help improve the
meaning of these lyrics, visit "Tale Of Two Cities" by Murs (Ft.
9th Wonder) and leave a comment on the lyrics box