Parasite

Actually i heard David Draiman say what it was about in an interview...

He said Parasite means a close person to him didnt say who, but a close person is living though the association of drugs and destroying there life. 
The people that his close person is hanging out with turns his friend into a drug addict and his friend does it "for just a taste of the life" cause everyone wants to have a little taste of the drug life. 

but anyone thats what it is about commiting the crime of drugs and being in that association of drugs