A Frisbee® is a plastic disc designed to fly in the air when it is thrown. Frisbee® is the registered name of a product manufactured by Wham-O, while the generic term is flying disc. However, "Frisbee" is often used to refer to any flying disc toy, much like "Band-Aid" for adhesive bandages.

While flying disc toys were not commercially manufactured until 1948, the concept is much older. Throwing aerodynamic discs for fun has probably been around as long as lightweight lids, cake pans, and plates have. The clay pigeons used for target practice since the 19the century resemble the Frisbee in design. Sometime in the late 19th or early 20th century, college kids at various New England institutions began throwing around the tins from a Connecticut pie company known as Frisbie, from which the Wham-O product takes its name.

The first commercial flying disc, developed by Walter Frederick Morrison and Warren Franscioni, was called the Pipco Flying-Saucer® and appeared on shelves in 1948. In 1955, Morrison debuted an improved design marketed as the Pluto Platter®. Wham-O bought his design, which remains in use for modern Frisbees®, two years later.

Frisbees® are often used for recreation, either informally or as a structured activity. Many people enjoy throwing a Frisbee® around between friends or to a pet dog in the park, while others engage in team sports centered around the Frisbee®. Some popular sports using the Frisbee are Ultimate (shortened from Ultimate Frisbee), Disc Golf, Fricket, and Double Disc Court. There are also structured Frisbee® catching competitions for dogs that are based on the game of fetch.

Frisbees®, or more accurately, flying discs, are manufactured in a variety of materials and sizes tailored to specific purposes. Those used for Disc Golf, for example, are smaller and denser than the typical Frisbee®, while Disc Dog uses durable flying discs that can withstand the ravages of canine teeth. Some Frisbees® are designed to appeal aesthetically to children, with bright colors, fun patterns, and even built-in lights for nighttime play.