Immature

What people who post definitions to this site are best at.

Bob: Hey, did you see that definition on Urban Dictionary?
Frank: Yeah, it was immature at it's best. o_o

by TheOrlyGuyLol January 24, 2010

Immature

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

Immature

Immature is a person, usually 8-15 year's old, (and mostly male) who think sexual and inappropriate things are funny.
This drives me totally crazy, when your the only kid of you age that is way more mature then everybody else areound you (like me)
They call everything they don't like gay, or retarded, and anybody smarter than them a nerd, because they are to incapable of realizing that they are stupid, and (not to be hypocritical) retarded...

-Immature person- You got high honor roll in school? Hahahha! Your such a gay nerd!

-Civilized person- Your immaturity is making yourself look bad...Not me

by TheJazzKidOfTheSchool666 June 25, 2009

Immature

Someone who acts annoying and stupid.

95% of 13 year-old Boys.

by Glittery Goddess June 23, 2004

immature

When someone doesn't look at another's point of view.

I think you should apologise to me (even though I've deeply hurt you).

by Peter Smith September 15, 2003

Immature

People who are annoying, don't know what they are talking about, and sometimes bitch way to much.

Look up Nu-Metal and you'll find many examples of the bitching part of immaturity.

by Drummer November 11, 2004

Immaturerness

a person who is silly or acts in a childish way

WELL I'LL JUST PACK UP MY BAND WAGON OF IMMATURERNESS AND HITCH UP A RIDE DOWN TO MEXICO!.

by pillow fan December 12, 2010