(n.) A prisnoer who has been ordered to spend life in prison.

a person who is employed at a minimum wage job, and is destined to work there for the majority of their life.

Someone in the military, especially Navy or Marines, who stays in because he's too scared of civilian life. Not all career military are lifers. Someone who is "career" is respected because they stay in because they like it, whereas a lifer hates being in the military but is too scared they will end up sleeping in their car if they get out (which sometimes happens). A lifer is basicly serving a self-imposed life sentence in the military. Lifers will kiss every ass above them in the chain of command and will try to make everyone else around them as miserable as they are.

A person whose sole purpose in life is to succeed at their minimum wage job. They often will be "two-faced" in that they will be nice to your face and then backstab you to others in order to advance their friendly relationship with their boss. Lifers will often get upset over trivial things that are work related and rarely have good things to say about employees who do not plan on becoming lifers. Lifers will commonly be attracted romantically to lifers of the opposite sex at the workplace. They will spend an unbelievable amount of time outside of work with this person under the guise that they are just friends. When faced with the opportunity to do something that will make their life better (i.e. pursue higher education)or pick up extra hours at their work, lifers will consistently do the latter. Lifers also have a unrealistic belief that their job is better than it really is. Because of this lifers will typically talk about their job even when no one is interested. Their is no proven scientific research regarding why lifers feel thier job is so important, but scientist believe it is because lifers are typically substance abusers that lack a sense of reason.

A person in a corporate setting (e.g. aerospace engineering) whose sole ambition is to retire, and to garantee their survival until retirement.

The lifer has minimal skills or exposure in their particular discipline, due in part to a 15+ year stay at their current (and often only) job. Additionally, those 15+ years are actually 1 year of experience repeated 15+ times. The lifer believes that getting ahead is about “staying power” and “paying their dues”, rather than tangible achievements based on applied experience in their field. When skilled individuals arrive, the lifer has no skills to fall back on to remain competitive, and instead relies on generation of politics to diminish the impact of the skilled individual.

Lifers are characteristically unhappy unless they are presenting a knife-hand to your face. They use this action in conjunction with a verbal reprimand for extremely minor infractions of marine corps regulations. They believe this is the proper way to enforce such regulations and take sadistic pleasure every chance they get to exercise this practice, commonly referred to as "lifing". Lifers are typically sergeants or above but can also be found in lower ranks. Lifers, ironically but understandably, have no life.

A classification for the most perfect woman you've ever seen. The term comes from the belief that if you land such a woman and she decides to end your relationship for any reason, you must subsequently end your own life. The reason being that you would never be so lucky to land another such woman so anyone else would be a downgrade.

It should be noted that this is an exaggerated term and you should never kill yourself if a girl breaks up with you. Idiot.

1. a convict serving a life sentence in prison

2. someone who goes joins the military and stays for the sake of having a job

1) (noun) a best, best, best friend - for life; noted for their strange sense of humor and similarities to "facets of a crystal"; can be found playing concentration at night in the middle of a driveway
see also: sexual six, snine, the family
2) (adj.) a word to describe a certain old, black composition book filled with many pages of inside jokes, doodles, stories, and a pokemon card; used in conjunction with the word, "book"