IDIOM - "Out (of) the window"

IDIOM - To "go out (of) the window":

It means gone; wasted, or no longer in existence .
If a quality, principle, or idea goes out of the window, it does not exist any more.

Examples:
"Then people start drinking and sense goes out of the window."
"All that work gone out the window because my computer crashed."
"My forty dollars—out the window! Why didn't I save my money?"
"It is as if everyone's good judgment has flown out the window."
If we quit now, we might as well just toss three months' work out the window."
"It is as if everyone's good judgment has flown out the window."