Quinion also notes that the title of the film In Like Flint (1967) is a play on the term, and that has led to a malapropism where some speakers believe that is the original phrase.
The name is a malapropism of Zyklon B, the trade name of a cyanide-based pesticide invented in the early 1920s and infamous for its later use by Nazi Germany to kill human beings in gas chambers of extermination camps during the Holocaust.
The hill was also known as the Pikollosberg, after the Old Prussian god Pikollos, and the Apolloberg, with the reference to Apollo being a malapropism of Pikollos.