n. Older person especially one who requires supplementary oxygen to survive.

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Dude! You are so wicked fearless with your rippers! Time to hang up the board if you want to live to be an oxygenarian.

Better to tear out your spleen than to fade away.
by gnostic 1 September 19, 2013
an elderly oxycontin addict
she not senile. shes just another oxygenarian
by jacksonvillan December 05, 2011
A person who abstains from drinking alcohol.
Shel is an oxygenarian since she chooses to remain sober and not consume any alcohol.
by Caitlin - HY October 28, 2008

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