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.
High School student 2 - He did graduate in '07. Man what a fossil.
by SLK Creighton February 21, 2011
Get the fossilmug. by hash July 24, 2003
Get the fossilmug. Out-of-date, old, conservative, becoming exhausted or used up.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.
Taken from "fossil fuels" it can refer to someone or something that is generally hurting young people or future generations.
by Lifeguard007 May 11, 2014
Get the fossilmug. FOSSIL is a standard for allowing serial communication for telecommunications programs under DOS. FOSSIL stands for Fido Opus Seadog Standard Interface Layer and was made by a group of Fidonet sysops to allow software work on different machines.
by Homer P. Simpson September 1, 2006
Get the FOSSILmug. by Yfjyvgygygy March 4, 2018
Get the fossiledmug. fossilingflashback throwback
by AliOoooooops January 15, 2015
Get the Fossilingmug. 
Get the Fossilsmug.