What is "bobblehead"

n. A collectible doll with a bobbing head

A bobblehead, also known as a nodder, wobbler or bobble head, is a type of collectible toy. Its head is often oversized compared to its body. Instead of a solid connection, its head is connected to the body by a spring or hook in such a way that a light tap will cause the head to bobble, hence the name. Bobbleheads are sometimes given out to attendees at sporting events as a promotion. Corporations including Taco Bell (the 'Yo Quiero Taco Bell' Chihuahua), McDonald's (Ronald McDonald), and Empire Today (The Empire Man) have also produced popular bobbleheads of the characters used in their advertisements.