The adjective boring people use to describe fun people.
JK: "Nip slip!"
Maren: "You're so immature"
JK: "You're so boring"
Maren: "I know"
by jmfk November 18, 2014

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A word women use to describe male behavoir which they cannot comprehend.
Ugly Becky: "OMG! Darrel cheated on me! I don't get it!"
Plain Jane: "Just forget about him Becky, he's just immature."
by ThEmperor November 18, 2008

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Soft and offensive. Just like you.

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People who spend money on eggs and don't ask you if you want them scrambled or fried; then proceed to call you immature. chicken farm shallow
" Would you like your eggs scrambled or fried today? Actually I think they would look better all over your cars; because thats not immature"
by thanksfortheeggs May 16, 2016

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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A word boring people use to describe fun people
" You're so immature..." " I know."
by LovethisAJ February 10, 2015

The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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living life to the fullest
Ashley and Katie are being immature by having fun .
by ImmatureGurl August 12, 2012

The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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A word that by incorporation of seperation anxiety may create illusion of being mature, audibly interpreted as I'm mature; also applicable to synchronous messaging or restricted sites.
IM mature enough for messy messenger, mmm?
by Hercolena Oliver July 10, 2008

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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Someone who maybe be irresponsible unorganized and does little kid things but all in all is a fun person!
A: MUD FIGHT!!
B: Your so immature.
by ieezsooperawzumninja February 14, 2010

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt