adultiversary 

The annual recognition of the date that two people, at least one of whom is married, began their extramarital tryst.

Jack and Jill have been married for ten years, but Jill is about to celebrate her three-year adultiversary with her sancho Matt.

adultiversary by Anon21412 May 20, 2014

Adultimatum 

An ultimatum given to a child by an adult, commonly to get the child to do something and stop them being a little bitch

"My son wouldn't put on his shoes, so I gave him an adultimatum and it worked a treat"

Adultimatum by The one true Neo February 1, 2015

adultly 

The mash up of the word "adult" and "like" together mainly used by lazy people, because lets be honest, who got time to write out fully two whole words?

I didn't know whether I should cry or laugh at how "adultly" they were acting.

adultly by This is for you Ryan B) April 5, 2016

Adultcation

An adult (21+) only vacation.

I'm always with my children, I need some me time. This adultcation for my birthday is greatly needed.

Adultcation by MommieTwoTimes July 8, 2016

Adulties 

Diapers for adults.

"Did you hear about Fred? He has to wear adulties to bed!"

"We have to go to the store to pick up some adulties for my dad."

Adulties by Lasagna_Cat November 11, 2016

adultiest 

Good at being an adult

I am the adultiest adult.

adultiest by Dhancbsusnevshwb May 20, 2017

adultie 

The art of not letting partying affect your day to day life.

We're adults and did adultie things

adultie by Adultie October 13, 2017