Dead as a button

At a golf outing, one of the players hit a nice tee shot and another exclaimed that the shot was “dead as a button”. This is a conflation of “dead as a doornail” (truly dead) and “on the button” (accurate or exactly right). “Dead on” was probably also swirling around the brain, as it also means exactly right. Kudos to Sandor Kovacs for sharing this one.