Top Definition
Opened Window, adj. is the term used to describe the amount of time available before the authorities arrive on the scene after a riot, protest, prank, graffiti or crime has been committed. Let me know when the coast is clear because the opened window is a short amount of time.
They knew they had an opened window of 3 minutes to spray paint that statue and leave before the cops came. Time span intentional act unexpected prank well timed protest rehearsed acts planned riot
by Amazingman April 19, 2013

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