Rendered down, her body fat would produce an awful lot of soap.
Marry, sir, she’s the kitchen wench and all grease; and I know not what use to put her to but to make a lamp of her and run from her by her own light. I warrant, her rags and the tallow in them will burn a Poland winter: if she lives till doomsday, she’ll burn a week longer than the whole world.
From The Comedy of Errors Act 3 Scene 2