Definition of "dunghil"

The sacred Scriptures […] called her a filthy Swine in reference to her Turpitudes. As a Jewel of Gold in a Swines Snout, so is a fair woman without discretion: a Dunghil for her Nastiness and Filthyness,

1662, Jacques Olivier, translated by Richard Banke, A Discourse of Women, Shewing Their Imperfections Alphabetically, page 6