So the ambush was sent out post-haste, and everything within the castle was at sixes and sevens.
T. H. White, The Once and Future King(1958)
So I used the term “myth,” and we were asked to leave post-haste.
National Geographic(Mar 29, 2016)
If so, you need to stop caring, post-haste.
The Guardian(Jan 01, 2016)