1. people who are addicted to illegal drugs, especially heroin
Usage: informal
2. people who are extremely enthusiastic about or devoted to something
Usage: informal

Examples

• The rehabilitation center helps junkies overcome their addiction.
• Many junkies struggle to find stable housing and employment.
• She’s one of those fitness junkies who exercises every day.
• The coffee shop is always full of caffeine junkies in the morning.
• My brother is a total news junkie who reads five newspapers daily.
• Video game junkies often spend hours playing online.
• The documentary followed several junkies through their recovery process.