Top Definition
One of the multitude of modern-day, thirty-somethings who act and feel immature relative to their "grown-up" parents at comparable milestones in life. (originally coined by comedian Matt Price; co-star of TNT's "Men of a Certain Age" )
Despite being 32 and having a kid with his longtime girlfriend, the fact that Joe was playing X-Box in his parents' living room and debating going back to grad school made him feel like a "Little Adult".
by Corpania July 24, 2012
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