White protrusions coming from one's gums. They are made of calcium, phosphorus and mineral salts. These materials combined are referred to as dentine. The shiny layer is called the enamel. Teeth are used in chewing food. Some people like to have artificial teeth made out of gold or other precious metals. Sometimes teeth made out of these metals are used as a status symbol.
A way to commit suicide by driving a car on a very busy highway/freeway/interstate at a very high speed, setting the car into cruise control and then climbing out of the car through the window and standing on top of the car as if the driver were surfing until the car hits something.
"Some dude in Arizona went car surfing on the freeway and killed himself."