The bi-product of washing hogs in a large, generally 100L beaker. The hogs are washed in a mixture of water and small amounts of soap by the hogwasher, who uses a hogwashing mop to wash the hog. The hogwash is then dispensed through the hogwash dispenser attached to the beaker, and is then distributed.
Hogwash is a well known, natural cure for many rashes, and sickness's, often recomended by chinese herbalists. Hogwashing kits may be picked up from your local herbalist.
Sick man: "I've got this horrible rash all over my crotch doc!"
Chinese herbalist: "Just put some hogwash on it! Kits are $45."
Sick man: "Awsome, thanks doc!"