junky
1. [ noun ] someone who is so ardently devoted to something that it resembles an addiction
Synonyms: freak junkie nut addict
Examples:

"a golf addict" "a car nut" "a control freak"

Related terms: enthusiast gym_rat addict
2. [ noun ] a narcotics addict
Synonyms: junkie drug_addict
Related terms: addict opium_addict heroin_addict withdrawer binger cocaine_addict
Similar spelling:   junk
  Junko
  junkie