This idiom or expression like phrase means:

Late.
Behind schedule.

If you say “The construction is off schedule,” you mean “It won’t be completed on time as planned.”

This word is a slang and it means:

Bye.
See you later.

This idiom or expression like phrase is a polite way of referring to a person who is not living.

“Sitting on the dock of the bay” was performed by the late, great Otis Redding.

This idiom or expression means:

Too little, too late!
It’s not enough. Besides, it’s too late!