end of the line

noun

A concluding or terminating: cease, cessation, close, closing, closure, completion, conclusion, consummation, end, ending, finish, period, stop, stopping point, termination, terminus, wind-up, wrap-up. See continue/stop/pause.

Also, end of the road. The conclusion or final outcome. For example, The editorial pointed out that it was the end of the line for the President; he'd never be reelected, or It was obviously the end of the road for this television series. This idiom alludes to the point where a road or line stops. [c. 1900]