The term SLICK LIQUID can be summarized as a liquid that is smooth and slippery. The crossword solution for this term is OIL, which is a type of liquid that is made up of hydrocarbons and other organic compounds. OIL is a common resource used in many industries, such as the production of fuel, lubricants, and plastics. It is also used in the production of cosmetics, pharmaceuticals, and other products.