Oozy substances are materials that have a slimy, viscous consistency. They are often composed of organic matter such as decaying plant and animal matter, bacteria, fungi, and other microorganisms. The term 'OOZY' is derived from the Old English word 'wose, ' which means 'SLIME.' The crossword solution GOOS is an acronym for 'Gelatinous Organic OOZY Substance.' This term is used to describe a wide variety of materials, including mud, sludge, and sewage.