Details: This poster shows drawings of skateboarders. At the top it says 'Over the Edge No Regrets'. It says 'No Regrets' in three other places, while at the bottom it says 'Slave Grinder'.
A skateboard is a four wheeled platform used for the activity of skateboarding. It is propelled by pushing with one foot while the other remains on the board, or by pumping in structures such as a half-pipe or bowl. That being said, the skateboard is not easily defined.