chi-dult 

an adult that is still a child at heart, and/or sometimes acts like a child.

likes to watch cartoons, play tag and hide and seek, play video games, etc.

Delia likes to watch cartoons, what a chi-dult!

chi-dult by d.net April 26, 2010

Chidult 

An adult hiding the personality of a child inside them

You act like such a Chidult

Chidult by Ashcash24 March 30, 2019

Chidult 

a person that has grown to adult size but whose mental capacity and attitude has not matured and developed appropriately. They often get on your nerves strutting around sharing their annoying irrational muttering and negative attitudes. Their character is tainted by the clash between their "know it all" stance and the fact that they really can not rationalize ideas & decisions on their own.

My supervisor is a real chidult, I wish he would grow up and get a life.

Please don't be a chidult, we really need mature adults on this team.

Chidult by VI Bird April 30, 2011

chidultry 

the act of spending time with other children besides your own, during holidays, dinner, vacations, etc.

My mother commited minor chidultry for eating dinner with someone else's kids, without me.

My mother commited medium chidultry for going to Vegas with someone else's kids, without me.

My mother comitted the most absolute chidultry for spending entire Christmas day with someone else's kids, without me.

chidultry by the_all-knower July 3, 2009