1 definition by Omar and Jason

Top Definition
the transformation of a young male's youthful appearance into an older male who looks around the age of 30 and older.
Jason, 28 years old, realized he had manned-out when his pic to a 23 year old on Craigslist was returned with the following message: "Can't you read? No one over 30!"
by Omar and Jason April 01, 2007
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