score 78
Last nail in the coffin
The idea that there is just one last piece to a puzzle, and that puzzle is a problem, and that problem needs just one small, but significant action in order to cause a death.
As in...
Jim the office supply guy: When you took that last coffee cup from the break room, after I had my eye on a nice tasty cup all morning, you really put the last nail in the coffin of my morning.







