c'est la gare
The broader, most accepted, defination to c'est la gare can be found in its urban French roots. Though, in the past, it referred to an arrival or departure of a train, today it is often used as a expression of waiting for the arrival of or departure of a pending event.
An example would be the departure of your hot girlfriend. You might say : c'est la gare, as you watch her walk away. You may also need to say: c'est la gare, as you are being hauled away in handcuffs following a beat-down you took after arguing with the cops. In either instance, you would be correct and a master of the "French" vernacular....