Definition & Meaning of "go out the (of) window"in English

What is the origin of the idiom "go out the window" and when to use it?

The idiom "go out the window" likely originated from the idea of something being thrown or discarded out of a window. It signifies the abandonment or disregard of a particular idea, plan, rule, or principle. In a figurative sense, it is used to suggest that something has been relinquished, forgotten, or no longer applies in a given situation, often due to changing circumstances or priorities.