Origin of poppycock
Perhaps from an unattested American colonial Dutch use of Dutch poppekak, doll’s excrement (in contemporary Dutch, found mostly in variants of the expression zo fijn als gemalen poppekak, excessively pious (literally, as fine as powdered doll’s excrement)) : pop, doll (from Middle Dutch poppe, from Vulgar Latin *puppa, from Latin p&umacron;pa) + kak, excrement (from kakken, to defecate, from Middle Dutch kacken, from Latin cacare; see kakka- in Indo-European roots).
- n. Senseless talk; nonsense.
- n. foolish talk; nonsense.
- n. Trivial talk; nonsense; stuff and rubbish.
- n. senseless talk
(American Heritage® Dictionary of the English Language, Fourth Edition)