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1.
A smelly wet fart that you have to check your pants for.
Oh shit i just olding'd myself.
Hows mum gunna get this olding out of my pants.
by Oh Hallo Roy! May 03, 2009
 
2.
Starting to show minor signs of aging. Like someone who isn't bald might be balding, someone who isn't yet old may be olding.
"Jim yelled at some kids who were playing on his driveway."
"Oh don't mind him he's just cranky because he's olding"
by satori87 May 14, 2009