Oleophobic is an adjective that describes a material or surface with a strong resistance to oil, grease, and other oily substances. This means that it repels or does not easily absorb these types of liquids, making them easy to clean off. Oleophobic materials are commonly used in various applications such as coatings for glass surfaces, fabrics, and even electronic devices like smartphones and tablets to prevent oil and grease from accumulating on the surface.