Speedcubing is the hobby of solving the Rubik's cube incredibly fast (eg. 30 seconds or faster). A person who practises speedcubing may be known as a speedcuber.
solving the rubik's cube, best puzzle ever, as fast as possible. It is very entertaining to solve, especially when you can solve it in under 30 seconds. It is a very physically demanding sport. You need to have very fast fingers and reaction speeds. It is very much like track and field.