An adult is when you're an, uh, well it's when you think you're a big boy, but really you're just a child in grown person's body and you hate your job and the other person that lives in your house.
by King Bob IV April 28, 2017
A person who has stopped growing at both ends and is now growing in the
middle.
by CLEWGE October 23, 2003
Adulting (v): to carry out one or more of the duties and responsibilities expected of fully developed individuals (paying off that credit card debt, settling beef without blasting social media, etc). Exclusively used by those who adult less than 50% of the time.
I was going to buy a sack of Blue Dream but I finally got my oil changed instead. Adulting!
by starcraft420 June 13, 2016
Peter Pan: You left me, to become a Adult
by Dammit Joshua January 14, 2019
Prejudice based on age, especially against young people.
The 13-year old spat in the face of the power-monger teacher and called her an adultist.
by Thylacine July 20, 2005
A soul broken by society; someone who has lost faith in people.
Little Timmy: I can't wait to grow up!

Adult Timmy: Why didn't I appreciate my childhood more!
by TheOneForPeace October 20, 2011
Being a responsible adult. Used by immature 20-somethings who are proud of themselves for paying a bill.
So tired from adulting! I went to my 8-5 job today! Look at me!
by bartimeas October 28, 2015