lifer

/L AY1 F ER0/
noun
  1. 1

    A prisoner sentenced to life in prison.

  2. 2

    A prisoner sentenced to transportation for life.

  3. 3

    A person with a singular career path, especially in the military.

  4. 4

    A bird species seen for the first time by a birder who is keeping a list of all the species he or she has ever seen.

Synonyms

Source: https://en.wiktionary.org/wiki/lifer