Epsom salts noun1 •magnesium sulfate, used as a laxative and in the preparation of tofu as a coagulator, and formerly as a medicated soaking solution.And who but July would know […] that her back needed to be rubbed after she had drank^([sic]) her Epsom salts so as to release, into a belch or fart, the wind that so plagued her. — 2010
