Rocker may refer to:

• Rocker, a British, 1960s style or retro-motorcyclist UK usage mainly but growing internationally
• Rocker (archetype), a person who listens to rock and roll or Rock music North American and UK usage
• Surfing : Rocker refers to the curvature on the bottom of a surfboard, skimboard, bodyboard, or Wakeboard. When looking at the board from the side, a board with a lot of curvature is said to have "a lot of rocker". Rocker can also be concentrated in the nose or tail of the board, in which case it is said to have "nose rocker" or "tail rocker". There exists three main types of rockers for wakeboards. Continuous, Continuous Progressive, and Three-Stage. Some riders may use one style of rocker for a specific type of boarding. (i.e. A wakeboard with a Three-Stage rocker on it means that the middle section of the board is flat, thus giving the rider more length in their "pop" across the wake. That length of "pop" may be more difficult to attain while using any other type of rocker)
• The rocker turn in figure skating

A Rocker may also be:

• A type of switch.
• A part of an internal combustion engine, especially one that control the rise and fall of cylinder head valves.

• Rudolf Rocker (1873-1958), german writer, historian and prominent figure in the international Anarchist movement
• John Rocker (born October 17, 1974), is a former American Major League Baseball relief pitcher,
• Lee Rocker (born on Long Island in 1961), is a rockabilly double bass player who started his career with "The Stray Cats"
• Tracy Rocker, American college football coach and former player
• Rocker, the name of a former drummer of the British indie band "The Flatmates".

Sports terminology | Engine technology | Motorcycling