by ron January 18, 2005

The act of being immature
the term became popular on the evening of 4/19/04
the term originates from one emily O.
the term became popular on the evening of 4/19/04
the term originates from one emily O.
that bitch was filled with immatureness
by Taylor April 19, 2004

by Chase1204 April 14, 2008

98% of the people on Urban Dictionary
by UberMan5000 March 27, 2004

Kid A: Dude i touched it and it got hard
Kid B: THATS WHAT SHE SAIDD!!!
Kid A: you're so immature
Kid B: F*ck you
Kid B: THATS WHAT SHE SAIDD!!!
Kid A: you're so immature
Kid B: F*ck you
by Hemesath May 13, 2010

Doing whatever it takes to make you happy and for some people, at least they're being who they are and not the stereotype of who they're supposed to be. Your inner child. Most people believe that age defines who you are and if you don't "act your age", you're immature. "Mature" people seem to be very depressed and settle for everything even if they don't want it.
Stuck up bitch: Why is that girl coloring in a spongebob coloring book? She's so immature.
Other person: At least she's doing what makes her happy, bitch.
Other person: At least she's doing what makes her happy, bitch.
by hofosho23 December 2, 2010

An overused term used by hypocrite teenagers (as in, 99%) to describe anyone or any opinion that they dislike.
Twilight fan #1: OMG that guy totally said Twilight is the boringest story EVER!!!
Twilight fan #2: OMG, he's so immature!!!
Twilight fan #2: OMG, he's so immature!!!
by lklkj98k November 1, 2009
