Ducktail is a hairstyle that was popular in the 1950s and 1960s and is characterized by a long, greased back and tapered haircut. The hairstyle resembles the tail of a duck, hence the name 'ducktail.' However, there are several synonyms for ducktail, including the quiff, pompadour, and slick back. The quiff is a hairstyle where the front of the hair is combed up and back, and the sides and back are short. The pompadour is a hairstyle where the hair is styled high on top and short on the sides and back, and the slick back is a hairstyle where the hair is combed back and gelled to stay in place.