The story
- Middle English · inherited from*hoggewasch
- English todayhogwash
From Middle English *hoggewasch (found only as Middle English hoggyswasch (“refuse of the kitchen for feeding pigs”, literally “hog's wash”)), equivalent to hog + wash.
First known use, by meaning
- from mid 15th c. A mixture of solid and liquid food scraps fed to pigs; swill.
Etymology from Wiktionary, CC BY-SA 4.0.