what movie about gangster,printing money, guy in a casino?

i don't remember what movie it is... all i cam remember is
first is a flashback about the hero..
then about the hero joining the mafia/gangster..
then about the guy working/or becoming a boss at the casino...
about the guy playing with money/ or printing money/...and about drug
dealing involve(or not)
its a gangster comedy movie..

(i think all the thing above is in flashback or opening of the movie)
thanks for help