To be tweening it one must gave spent over 23 hours on any given game in under two days. This phrase can be used to mock, however it can also be used to describe one's own actions.
Did you hear about Eric? He spends his weekends tweening it.

Or

I just spent my entire holiday tweening it on Borderlands the pre-sequel.

Or

James : You're such a bangout Andrew!

Andrew: Nah, I'm just tweening it.
by Hip Kid May 18, 2015
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When one spend more than 23 hours in two days on any one video games.
Chris had just spent the weekend tweening it on borderlands the pre sequel.
by Jimmy Nips May 15, 2015
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When one spend more than 23 hours in two days on any one video games.
Chris had just spent the weekend tweening it on borderlands the pre sequel.
by Jimmy Nips May 15, 2015
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a girl ages about 9-14...too old for toys, but too young for boys.

Very easy to market to, will usually follow any fashion trend set for them, will most likely go through the phase of 'finding themselves' as they 'grow up'.
1. Mary-Kate & Ashley Olsen's main fanbase are all tweens.

2.
tween 1: LyK oMg, I aM jUsT gOiNg ThRu TeH hArDeSt TiMe Of My LyF...i RaN oUt Of EyEsHaDoW!!!!
tween 2: OMG!!!! DO YOU NEED ME TO COME OVER FOR SUPPORT?!?!?!?!?!
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Mainly females, 9-12. They religiously believe that they are a teenager, although they are under the age of 13 (which is the true beginning of teenagerism) This is a confusing time, as they try many things and do many things.

Such as, they try to level up from small makeup things from Claire's to shopping at Sephora. They try to go to Hollister or Fitch instead of Justice or GAP. They try to level up from a plastic phone to an iPhone 6. Basically, they try to become a teen by visualizing their own stereotype of a teen.

Saying that, they do mess up in some areas by becoming drama queens, gossiping, even going as far as judging and bullying others who maybe don't do or have as much as them. The more mature ones, preteens, are fine. They stay casual, don't really fit in anywhere, don't gossip or judge, and maybe just calmly talking to someone or playing video games with a group of friends. They are kind of the odd ones, but the cools. (like me)
NORMAL TWEEN:

Tween 1: OmG, I SrSlY nEeD 2 gO 2 HoT tOpIc!!!!!!1111oneone
Tween 2: Y?
Tween 1: BeCuZ i Am Soooo EmO! I lUv 1d! tHeY r RoCk, r8?
Tween: ToTz.
Tween: YeAh, I HaVeN't eAtEn mY gUmMies 4 lyk DAYS!

PRETEENS:

Preteen 1: Hey, what did you get on your math test?
Preteen 2: I flunked, why?
Preteen 1: I got an A. Maybe I could help you study?
Preteen 2: Sure! When, though?
Preteen 1: After soccer practice tomorrow. How about that?
Preteen 2: Sure!

(SEE THE DIFFERENCE???!!!)
by risingSKY January 20, 2015
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I am eleven years old, and tweens seem to be exactly what you think they are. Only a few of my classmates can write a coherent sentence, and even the ones who can are obsessed with Justin Bieber or Avril Lavigne or, in extreme cases, Twilight.
While many people seem to think there is a single, strict recipe for stupid tweens, they are actually all stupid in their own special way. For example, the girl who calls herself emo when the only songs on her iPod are by Taylor Swift, or the one who eats one piece of candy at recess and becomes "ZOMG SO TTLY HYPER-RAND0M!!1! CHEEZ!" Generally, most 10-12 year olds don't care what you call them, but you're better off calling the intelligent ones "Pre-teens" or "Young adults", to distinguish them from the 'other' ones.
Before you judge a tween, take a good look at her. Is she wearing an inappropriately short skirt? Is her bra stuffed? Is she squealing and dancing around with her friends? Or is she wearing appropriate clothes for her age, perhaps chatting with a friend or on the phone, but overall being calm and mature, like a normal human? Think before you judge.
(An actual conversation with one of my peers)
Me: You're not going to get better if you keep doing that.
Other Tween: Doing what?
Me: Well, I'm supposed to be helping you, but you're just copying my answers.
Other Tween: So? That's not gonna stop me from getting into Harvard!
(She gets C's and D's in math to this day.)
by Pudgy Adolescent February 2, 2011
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A word that is used by marketers to describe youths between the ages of 10-13. Although some believe that tweens are actually between the ages of 10-15. Despite the fact that tweens have always existed, marketers continue to lay claim to discovering them. The word "discover" is often misused, especially in a historical context. No one discovered the tweens. What marketers actually discovered was their purchasing power. Tweens will spend around 1.4 to 1.6 billion dollars in a year!
Reporter: Tweens spend 1-2 billion a year!

TV viewer says as he hand his 12 year old daughter $50. "Wow where did those 10-15 year olds get so much money?"
by Ask Reeves! June 19, 2003
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