Slang term, means someone needs to change their behavior as they are acting childish.
by RogueUser May 23, 2020
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A phrase parents use against there children, who were a lot more fabulous and fun than they were
*Carlie comes home 2 minutes past curfew*
-"How unacceptable, grow up"
by RihannaNavy23 May 14, 2016
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Something you would say to most users in Urban Dictionary
Most definitions posted by users on UD are dirty, sexy, pervy. Grow up
by Suklaa November 10, 2019
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That thing you've got a whole lot of to do.
Me: grow up
You: 🙄
by LiberalDestroyer007 November 16, 2018
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Something somebody doesn't have to do if they have reached a certain age and haven't done so already.
If somebody is 40 years old and still a child, that's their business. They don't have to grow up if they are still alive and still a child at the same time.
by Solid Mantis April 27, 2021
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Means that people think that you are pathetic and you need to grow up otherwise ur just gonna get bullied even more and they will keep nugding you !
Bully: Omg ur so lame grow up !!
Person:no why don’t you

*boom* the person gets Beaton up
by Xxxmegs.bxxX December 10, 2019
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The feeling of childhood freedoms slipping away without any warning, the loss of unstructured time for relaxation, the necessity to work to survive. The impending journey across space and time to achieve one's dream, the feeling of hopelessness when that dream is not achieved, reflection upon one's carefree childhood, longing, regret and desire for a good retirement fund and a glass o' prune juice.
My Dad paid off the mortgage with my college fund, because since I'm "growing up", I should learn to pay for my own things.
by Grim Repairer August 26, 2008
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