a fraudulent tale, a tall story, nonsense; usu. in phr. old ackamarackus.
|Runyon on Broadway (1954) 370: This is strictly the old ackamarackus.‘Lemon Drop Kid’ in|
|Grierson on Documentary 74: On examination, it is, of course, the old ackamarackus with a vengeance.|
|Dilys Powell Film Reader 294: The film, in fact, has every opportunity for the oldest ackamarackus. It takes the opportunities – and uses them.|