← BackshareGuesspigwash/ˈpɪɡˌwɑʃ/nounLiquid waste or leftover food fed to pigs; swill.They poured the pigwash into the trough for the sows.Pigwash is often a mix of grains and vegetable peels.The farmer collected the kitchen scraps to make pigwash.Synonymsswillslop