Epithet given to somebody who excessivly uses illicit substances such as marijuana.

Eponym of the "Hopi Indians", a spiritual tribe of native americans.

However there is a difference between a Junkie and a "Hopi".
In contrast to a junkie, marijana doesn't have a psychotomimetic effect on a "Hopi" that deranges the mind, causing the user to run amok, wreaking incalculable damage to his fellow man.
Instead a "Hopi" is more of a relaxt, spirital person who smokes marijuana because he believes this helps him philosophize on life.