Immature

[Couch Potatoe]

Someone who thinks vulgar words are funny. Most children exhibit this behavior.

[Jessica]

A word utilized to describe someone who exibits the behavioral patterns of a child. Such people tend to be impulsive; an example of which, is a tendency to use unwanted physical contact on another person, or making statements in complete ignorace and crudeness. Immature people also tend to make narrow associations of certain actions with certain effects, such as the association of biking with falling off.

[Donald Trump]

I agree with this definition:

98% of the people on Urban Dictionary

[Tina]

What many high school students are. Nuff said.

[Tanya Shivari]

1.) 99% of high school chicks who laugh hysterically at things that are not remotely funny 2.) 90% of college chicks who soak themselves up with drama and send 4 different text messages to their boyfriends, all of which say the same thing

[Mark Zuckerberg]

Not mature; unripe; not arrived at perfection of full
development; crude; unfinished; as, immature fruit; immature character;
immature plans.

[Gregory]

Doing [whatever it takes] to make you happy and for some people, at least theyre being who they are and not the stereotype of who theyre supposed to be. Your [inner child]. Most people believe that age defines who you are and if you dont act your age, youre immature. Mature people seem to be very depressed and [settle] for everything even if they dont want it.

[Renato]

An [opinion]. someone created it so [others] would [act like] them

[Julene]

An [overused] term used by [hypocrite] teenagers (as in, 99%) to describe anyone or any opinion that they [dislike].

[Dianne]

someone who looks for all [the dirty] words in a [dictionary] [first].

[Jason Yan]

One who abuses [drugs] to feel [grown] up.
One who abuses [alcohol] to feel grown up.
One who calls people immature.

[Jessica]

Someone who:
1: constantly makes penis or [fart jokes]
2: praises their name on urbandictionary.com by saying it means huge penis or [awesome person]
3:makes fart noises with their mouth and/or arm
4: calls everything and everyone they dont [like gay]

[Luis Fok]

Not fully developed.

[Raeanne Dimick]

In a [generic] age-irrelevant [view] of the [concept]: someone who wouldnt or cant get himself to do what they know is the right thing to do.

[Vania]

-People who insult everyone who has a [different opinion] than theirs, usually with a personal, racial, or gay slur.
-People who become alcoholics and/or do drugs just because “it’s cool.”
-People who tend to be [impulsive]; an example of which, is a tendency to use unwanted physical contact on another person, or making statements in complete ignorance.
-People who act like a bitch because someone doesn’t want to do something for them.
-People who only ever need you to use you.
-People who behave like [hypocrites] too often.
-People who constantly bitch about their life when they have it better than who they are bitching to, or for attention.
-People who talk shit because they’re insecure about themselves, then get upset when the person finds out.
-People who offensively use words that are not interchangeable because they are too ignorant to [educate] themselves.

[Kai]

A [childish] [person].

[Julene]

A [childish] [person].

[Couch Potatoe]

not behaving in a way that is as calm and wise as people expect from someone of your age: