1. an old-fashioned person

2. an elderly person
Why do I have to listen to this old fossil?
by Light Joker July 14, 2005
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A person, typically a no life, college-aged, high school graduated degenerate, who regularly attends high school parties hosted by those who are still in high school.
High School student 1 - Why is John at this party? Didn't he graduate from high school in 2007?

High School student 2 - He did graduate in '07. Man what a fossil.
by SLK Creighton February 1, 2011
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Old person with wrinkly parts. See also calcium.
Damn, yo momma is h0t for a fossil!
by hash July 24, 2003
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Out-of-date, old, conservative, becoming exhausted or used up. Generally an old timer with no future.

Taken from "fossil fuels" it can refer to someone or something that is generally hurting young people or future generations.
"Man, that politician is such as fossil!!"

"Yeah, he actually owns an oil company..."
by Lifeguard007 March 29, 2014
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a fossil is a disabled person, however even if they have tourette’s, tourette’s doesn’t have them!
person 1: “are u disabled?”
person 2: “yes i’m a fossil but even though i have tourette’s, tourette’s doesn’t have me!”
by the.curry.fossil April 28, 2020
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Adjective. Older than old school. Describing some experience, action, or word to which someone under sixty years-old would not likely have been exposed or no longer has relevence.
Fossil move dude - who let you out of your tar pit?. How fossil! Mondo fossil. Way fossil.
by Richard "Fossil" Wood April 24, 2008
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(noun) An out-of-date opinion
"Bush always knew what he's doing."
"Oh man, that's the shittiest fossil I've ever heard!"
by JoshDC August 13, 2005
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