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.
Matt: Did you see that girl at the Racetrac?

Carlos: The one with the glasses?

Matt: That's her.

Carlos: Oh, yeah. Total lifer.

Matt: God help us.
by Carlos V March 14, 2013
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A person who has gone to the same school for 13 years, or from kindergarten to senior year. Lifers are only found in select private schools.
Jamie is a lifer, she's gone to school with Kayte.
by liferjane September 9, 2009
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when you try to get yourself involved in other people’s drama that you have no business in because you lack a personal life
elio and adriano (no lifers) talking shit about loren
by chiceknlil' February 21, 2023
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A term used by birdwatchers to describe any bird species that they are observing for the first time. This usually means that the observer saw the bird, but some birders will count species that they only heard and did not see as a lifer. Mostly used in the context of birdwatching, but can also be applied to other outdoor hobbies, such as herping.
Beth: Woah, is that a Yellow-bellied Sapsucker over there high up in that oak tree?
Mike: Sure looks like it! The lack of red on the back of the neck and black border around the throat are distinctive for that species.
Beth: Hooray! That's a lifer for me!
by cumlover1 September 21, 2021
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An extremely bad ass song by the band Down, that is on their first album NOLA.
Lifer by Down was by far the most awesome song they played at the party.
by MetalMaiden85 September 18, 2011
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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
Some lifer was trying to sue the prison for negligence because of an itch.
by The Return of Light Joker March 30, 2010
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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"
1) It's always a wonderful feeling to see "lifers in the distance."
2) "Hey kids, listen to this! BUM-DA-DA-DUM-DA-DUM-DA-DUM-DUM-DUM! HAHAHAHHAH," she read from the lifer book.
by spolliewoo October 24, 2007
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