Rejuvenile
Full definition of rejuvenile
Noun
rejuvenile
(plural rejuveniles)- (informal) An adult whose interests and activities are characteristic of those of children.
- 2007, Tony Dokoupil, "Forty-Year-Old Virgins", Newsweek, 15 December 2007:At $15 to $30 for each action figure, re-staffing the Cobra Command center (home to G.I. Joe's arch-nemesis, Cobra Commander) isn't cheap. So what's driving this rejuvenile movement? Marketing, mostly.