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15.
-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.
Your little brother may be immature
by therealdeal,itsbacon October 09, 2011
34 8
 
1.
98% of the people on Urban Dictionary
"GEORGE W. BUSH" - Wanker. (Definition by OMGWTFMAN346)
by UberMan5000 March 27, 2004
1472 302
 
2.
Teenage guys who:

1. can't go a minute without making a sexual remark
2. call everything they don't like "gay"
3. openly insult everyone who has a different opinion than theirs, usually with a racial or gay slur
4. have a tendency of shouting words like "PENIS!" in public
5. lack the intelligence to make a formal argument, yet think they're so awesome because they know, as someone before me posted, 100 ways of saying the word "penis" or 100 different sex methods.
6. become alcoholics and do drugs just because "it's cool", without considering that these drugs will cut their life expectancy in half, as well as make them look like total idiots when they're high/drunk
7. call everyone with at least 1.1 times their intelligence a "nerd", because EVERYONE knows that society has deemed it "cool" to be dumb as a stick
8. are the kind that drop their pants on purpose in public, sexually harrass everything that moves, or violate other kinds of dress codes and behavior codes.
Most teenage guys are immature, and not just in real life, but on the internet as well. This site displays perfect examples of immaturity at its best.

And btw, I'm a guy too.
by SomeBadJoke December 31, 2006
1198 234
 
3.
What one redneck says to another when he wants his chair back.
Hey, you done sat immature and I be wanting it back.
by Chase1204 April 14, 2008
642 122
 
4.
A young person, usualy a 8-14 year old male that knows 100+ words that mean penis and lives his life just to have them all published in an on line dictionary of slang.
Oh my! You knew that another word for penis is pennyprick! How immature of you to try publish it.
by Tenarr June 21, 2005
467 196
 
5.
what people call you when your a teenager and your doing something fun for little kids. Usally people say this to make themselves feel older and more mature even though there not.
Sam: Dude wanna go have a mud fight!
Kevin: Your so immature, thats for little kids.
Sam: Fuck you at least I'm not an asshole.
by a-manster August 03, 2006
340 140
 
6.
Someone who thinks vulgar words are funny. Most children exhibit this behavior.
Child: I drew a butt! Ha ha ha! Me: That's not funny. That's immature.
by spel itt rite January 16, 2006
308 133
 
7.
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.
by anonymous October 21, 2003
238 68