The term "over-and-under" refers to a method of construction or arrangement where one element is placed above another and then below it in a repeating pattern. This technique is commonly used in various fields, including textiles, woodworking, and even in sports like basketball when describing a type of shot. In the context of fishing, "over-and-under" can describe a specific casting technique where the angler alternates between casting over and under obstacles, such as branches or rocks, to reach the desired fishing spot. This approach requires skill and precision to effectively navigate the environment.