A junkie (or junky) is a heroinaddict. The word has also come to be used to describe addicts in general, and even more loosely, enthusiasts and obsessives (as in the term "science fiction junkie").
... White, 12.30% African American, 0.13% Native American, 6.05% Asian, 0.03% Pacific Islander, 4.94% from other races, and 2.91% from two or more races. 19.10% of the ...