指抽烟或吸毒上瘾的人drug addict or smoker

• 在有的空调场所，瘾君子也吞云吐雾，旁若无人。

  In some air-conditioned areas, smokers still puff away as if there were nobody else in the room.

• 报上报道了她同吸上了毒品的瘾君子的谈话。

  The newspaper reported her conversations with drug addicts.