An
individual who is addicted to narcotic drugs like heroin, morphine, oxycodone (OxyContin/Percocet),
hydrocodone (Vicodin), or other opioids, but can still maintain a normal and
successful life.
A functional junkie is a person that can have a family, have a successful career, successful education, and maintain
relationships, as long as they have their dope, because once they don't have it, then
everything spirals
out of control.