adultescent

[ad-uhl-tes-uh nt, uh-duhl‐]

noun

a young adult or middle-aged person who has interests, traits, etc., that are usually associated with teenagers.

Origin of adultescent

First recorded in 1995–2000; adult + (adol)escent
Also called a·dul·to·les·cent [uh-duhl-tuh-les-uh nt] /əˌdʌl təˈlɛs ənt/, kidult.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for adultolescent

adultescent

noun

an adult who is still actively interested in youth culture

adjective

aimed at or suitable for adultescents
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012