Top definition
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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