junkie         
noun [ C ]  informal (also junky) uk/ˈdʒʌŋ.ki/ us/ˈdʒʌŋ.ki/
 mainly disapproving瘾君子,有毒瘾者 
someone who cannot stop taking illegal drugs
  上瘾的人
someone who wants to have or do something all the time
  a computer/TV junkie 电脑/电视迷 
 a publicity junkie 爱抛头露面的人