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1. people who are 20 but act like 9

2. people who scream like a little 7 year old girl

3. people who sometimes don't care about their responsibilities.
14 Year Old: *starts acting stupid*

Me: boi, you are SO childish!

14 Year Old: what? what does that mean?
by thatunkownwaffle February 05, 2018
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Jul 23 Word of the Day
A tourist to sub-orbital or orbital space, through commercial space flight programs.
Jeff Bezos and Richard Branson alongside their crew became the first astrotourists, while visiting sub-orbital space in July 2021
by AxonL July 20, 2021
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3
Childish: immature action , or a fucking amazing hoodie that dropped 29th of June , that ting was fire I ate a Fucking flower for that shit (fuck you danny) . Yeh I copped what r u gonna do ?
*in jay swinglers voice* childisshhhhh
Wow you’re very childish
by Topshggerda July 28, 2018
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4
To act with qualities of a child. Most often considered negative, however, children also have positive qualities. Therefor, Childish can be positive... such as cute, whimsical, and playful. It can also be neutral. Somebody who curls up at night with a stuffed animal is childish, but this is not the least bit negative.
Awww... my GF is so cute and childish, I'm gonna go get her some Hello Kitty stuff.
by Hello Jessica July 12, 2008
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5
What many adults prentend not to be, and what many childen aren't.
Bob "I'm so childish"
Steve "Nothing wrong with bein' childish now and then. We all are at some point."
by Fly Attack December 21, 2009
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6
What most adults act like...
WW1,and 2, all wars, Holocaust, 9-11, slavery...etc
by Lindsay February 25, 2003
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