lifer
lif‧er /ˈlaɪfə $ -ər/
noun [countable]
lif‧er /ˈlaɪfə $ -ər/
noun [countable] Word Family: noun: life, lifelessness, lifer; adjective: lifeless, lifelike, lifelong; adverb: lifelessly
informal someone who has been sent to prison for the rest of their life