lif·er 
/ˈlaɪfɚ/ noun
plural lif·ers /ˈlaɪfɚ/ noun [count] informal 1 US : a person who spends an entire career in the same job
▪ He was a lifer at the factory. ▪ an army lifer 2 : a criminal who has been sentenced to spend the rest of his or her life in prison
▪ lifers seeking parole
▪ He was a lifer at the factory. ▪ an army lifer
▪ lifers seeking parole
