kiss-off 
noun informal, chiefly North American
A rude or abrupt dismissal or rejection: ambassadorship was the usual kiss-off for a senior official...
- But Williams isn't just writing a bunch of bitter kiss-offs here.
- In the song, Jones confesses that she's humiliated herself in a bad relationship, so by its conclusion I was expecting a great kiss-off.
- Around 12.30 am, George announced that the time had arrived… time for the big kiss-off.