Pseudo-Latin, possibly coined by Damon Runyan.
- Meaningless activity engaged in just for show; deceptive nonsense.
1947, Emanuel W. Robson & Mary Major Robson, The world is my cinema, page 109:
- This story of coal miners (John Wayne and Randolph Scott) who become coal-owners and rivals for the affections of La Dietrich is the purest and oldest ackamarackus.
Typically used in the phrase "the old ackamarackus".