Someone who makes a career out of working in a particular call center. There will usually be one or two people in a call center that have been there for eight years or so (maybe longer) who have somehow escaped the regular fire-hire process that call centers go through. They usually have a tired, burnt-out look to them and can be seen hunching over their workstation in a hazy daze.

Someone who will spend the rest of their life in prison

Intelligent but socially inept employees who lack the motivation to look for another job in this lifetime

Someone who, despite forces to the otherwise, continues doing something for an extended period of time.

In the military or elsewhere
A lowly insufficient fucker expecting retirement

A career US marine after a war ends who keeps reenlisting and makes the corps
his home.It stands for Lazy Ignorant Fuck Expecting Retirement.

Not to be confused with professional US marines that love the Marine Corps and
stay because its their chosen profession. LIFERS stay because they sit around,
don't do shit,Spit shine their boots and kiss the officers asses.They fuck the working dedicated marines every chance they get.

A term to describe the state of mind resulting from what may be too many years of working closely with and empathizing with incarcerated lifers.