Cow dung
In Ezekiel 4:15, this signifies that the prophet was to represent the corruption of the literal sense of the Word. (The Inner Meaning of the Prophets and Psalms 127)
Transgressions or trespasses
'Transgressions' or 'trespasses' denote evil done against the truths of faith.
(Odkazy: Arcana Coelestia 9106)