when someone is so eager to seem cool in an enivronment where they are in over their head that they act like really extravagant or extreme things are completely normal.
9 year old girl: yeah they got together last night!
overcasual 9 yr old: oh right, they had sex, no big deal
9 year old girl: ew no! they held hands
overcasual: oh right..
by angelacia October 24, 2010
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