A person who has stopped growing at both ends and is now growing in the
middle.
by CLEWGE October 23, 2003
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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
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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
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A person who thinks that they are always right and you are always wrong because they are 18 years out of their mother's buttocks and you are not.
Adult: It doesn't matter if we cheat, steal, lie, kill other people, abuse drugs or start illegal wars for profit or how many times we were wrong beforehand, you must always obey us without question.
Child: Screw you!
Adult: Faints, before screaming "Go to your room"!
by Hot.rodz September 2, 2019
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the reason for so much evil and stupidity on this earth. everything that is wrong on earth is caused by adults and still children gotta respect them.
rick-i have become an adult now

jack-oh welcome to moronhood
by martianthemarvin June 9, 2011
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the act of being an adult; to do things your parents would normally do, but they aren't around, so now you have to do them whether you know how or not.
Today I adulted when I took out a loan for school without my parents being there.
by Jc23 August 6, 2015
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