Rocker

Rocker means that your board is designed so that the lowest point of the board is closest to the ground. Imagine the board is curved like a banana with the sides curved upwards. This allows you to get closer to the ground and you usually get a more blunt feel in the board compared to if you had a “Camber", which is the opposite. Where the board is curved like a banana but where the highest point on the board is in the middle. This usually gives more flex.

There are different variations and combinations of bends and shapes to achieve different properties and there are also shapes that are double rocker when talking about construction on snowboards, for example.