point of no return
- (aviation) The point in an aircraft's flight when there is insufficient fuel to reverse direction and return to the place of origin.
- The point in any journey, process, or sequence of events when it is no longer possible to reverse course or stop the process.
- climax, orgasm
(aviation) the point in a flight when there is insufficient fuel to return to the origin
(idiomatic) the point when it is no longer possible to stop the process