1. Regular stance is when you ride with your right foot on the tail and
and your left foot in the front.
2. Goofy stance is when you ride with your left foot on the tail and your right foot in the front.
3. Fakie means you are going backwards but still in the regular position.
4. Switch means you are riding the opposite stance. As in if you are regular you would be riding goofy.
5. Backside means that you spin with the board the way you are facing. Like in a backside 180 ollie you spin the way you are facing.
6. Frontside means that you spin the opposite direction you are facing. Like in a frontside 180 ollie you spin the way your back is facing.