WINDOW, THROW (BOOT, KICK, GO, ETC.) OUT THE

1. to toss out, discard or abandon; to no longer take something into account; go out of effect. This phrase alludes to hurling unwanted items out of a window. 2. to become discarded, neglected, worthless, wasted, etc. 3. a coined variation of go through the roof, meaning to rise up to or beyond acceptable limits, said especially in regards to prices; to hit extreme heights. It can also be used to mean to increase beyond expectations. Roof is used here figuratively to mean the highest point of something.