lifer       
noun [ C ]  informal uk/ˈlaɪ.fər/ us/ˈlaɪ.fɚ/
 遭长期监禁的罪犯;(美国的)终身囚犯,无期徒刑犯
someone who has been punished by being put in prison for a very long time or until they die
  In the 1980s, 726 lifers were paroled.
 Releasing lifers is a very complex issue.
 - More examples
 - Some of the prisoners are " juvenile lifers" who began serving their terms as young as 14.
 - McFadden is not representative of the broader lifer population.
 - Thompson, a company lifer, has served as CEO without being chairman in the past.
 - As a fashion- industry lifer, Blair knows that accessories are the profit lifeline of most luxurious fashion labels.