Fitchoon
The sound uttered by the thrower of any object when it is tossed across the room or playing field and lands successfully in a trash basket, garbage receptacle, or its intended destination. An interjection. An excited exclamation of victory usually accompanied by the triumphant raising of a fist, high five or thumbs up.
The boy uttered "FITCHOON" through the silence of the room, as his wadded up assignments found their mark one afternoon.