Butter

Most Old Worlders churn their own butter in their homes. Not only is it good on bread and cake, it can also be used as grease to coat hinges, help you slide through a tight space, or waterproof (to some extent and only in cold climates) a bag or pouch. That said, there is little worse than the stink of rancid butter.

Source
[[Category:B]]
 * Warhammer Fantasy RPG 2nd ED -- Old World Armoury
 * pg. 58