Regular and goofy refer to the feet that you put towards the tip (front) of the board. A regular rider, for example, will place their left foot in front of the skateboard. The right foot of a regular rider is the back foot. This foot will be the one they use to unstrap their foot when skating in the chairlift line. Goofy riders are the reverse - they have their right foot towards the front and skate with their left. Most snowboards can be easily swapped between sexes. Certain asymmetrical snowboards that have stance are an exception.