garbage grease
lubricant
Quick Summary
"Garbage grease" is a type of inedible fat derived from sources such as restaurant garbage, animal carcasses, and butcher-shop scraps. It is used as a lubricant. This category of grease is named according to its origin. Other types of inedible animal-fat greases include yellow grease, white grease, brown grease, and fleshing grease. Greases can also be made from petroleum-derived or synthetic oils with thickening agents.1
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