Adulteen 

18 or 19 year old. The ultimate age! I am BOTH a teenager, AND an adult!

Our church has an Adulteen group, we do lots of fun things on Saturdays.

Adulteen by Little Amy June 11, 2006

Adulteen 

An immature adult. A grown up that acts like a teenager.

Louise is a 30 year old adulteen who loves to party.

Adulteen by Havana192 January 18, 2009

Adultrenabler

A single male who engages in an affair with a female who has a significant other. Root Words ( adulteress, enabler) Language of origin : English. See also: Adulternabler (single female, adulterer male).

After meeting both my friend's girlfriend and her fiance, I would have to agree that he is an adultrenabler.

Adultrenabler by Slausonizer June 6, 2013

adultween 

(noun) -- Those in the process of transitioning to adulthood. Can be identified by their use of social media to announce their latest adulting accomplishment. Ex. "Great job adulting today. I made my own appointment to see the dentist." (Adjective)-- to describe a person who is transitioning to adult independence.

Adultweens seek recognition for completing mundane tasks that show they are taking responsibility for themselves, such as doing laundry and seeing the dentist.

adultween by bigredtaxi July 20, 2016

adultren 

Adults that behave like children

"That bar is always filled with adultren"

adultren by Knee Toe December 17, 2015