The only "common use of those words" is what the captain posted. I have never heard that term used in any context outside of someone that holds a position, political or otherwise, that will be gone soon, either from term limits, because they lost or didn't run in the last election, or got fired/replaced/quit, but the new person isn't in the position yet.

You used it wrong. You can learn from the person that responded to you or you can double down and try to invoke a little-to-never used definition, but everyone will know you just used it wrong.