Used by a person who can not have fun.
"Gosh Sepand you are so immature"
A group of people who say the word "eww" too much.
"Eww, why are we so immature eww"
Selena
Destiny
Rachel
+ Friends
by <3cum<3 January 07, 2008
A group of people who say the word "eww" too much.
"Eww, why are we so immature eww"
Selena
Destiny
Rachel
+ Friends
by <3cum<3 January 07, 2008
1. The term used by girls ranging from 8th-10th grade to describe guys in their grade as an excuse for becoming sluts to college guys in a higher grade.

2. Used to describe adolescent people who don't drink alcahol, take recreational drugs, drink coffee, sneak out of their house at 1 am, have sex etc...

1.
Kate: The guys in my grade are so immature, which is why I am going out with this new guy.

James: Do I know him, what's his name?

Kate: I don't know but he is 21, has a car and and can buy me and my friends beer

2. Brandon doesn't drink, therefore he is extremely immature
by Jason_Cali28 December 08, 2006
coop whilst laughing at Dimebag Darrels death. coop is an ass!
jon: dimebag's dead
coop: ha ha ha
brookstar: coop u iz gonna get banged!
loz: Coop you is a fool! Coop has no willy!
*whole class cracks up*
Coop: *shits pants for sixth time*
by loz spencer December 14, 2004
Unripe

Underdeveloped emotionally and intellectually

Stunted growth in being able to conform to social norms, exercising empathy and exhibiting compliance

Acting in a ridiculous manner with no social skills or functions beneath their age appropriate cognitive level.
Do you know how immature, inappropriate and utterly stupid you sound and are. Do you have any idea?
by dollythesheepbaah February 25, 2015

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