junky(noun, adjective) adjective1. Resembling or characteristic of junk; cheap, worthless, or of low quality. noun1. a narcotics addictSimilar word(s): junkieDefinition categories: person, addict2. someone who is so ardently devoted to something that it resembles an addictionSimilar word(s): addict, freak, junkie, nutDefinition categories: person, enthusiast, partisan, partizan