Code name for the drug Heroin
, especially between drug users and drug dealers when conducting a deal over the phone.
Nowadays, a dealer who sells heroin almost always sells crack cocaine too, and vice versa. And because dealers are so paranoid all the time about getting caught by the police, they don't appreciate users blatantly asking them for drugs by their names heroin and crack. This is especially true when talking on the phone as they always believe the line to be tapped by the police.
So from the colours/slang terms associated with the two drugs, i.e. brown
for heroin and white for crack...
Brown has become Brandy and...
White has become Whisky