What does backside mean?
Backside and frontside refer to the way a surfer is facing relative to a wave. If a surfer is facing away from the wave, he is surfing “backside”. IE, the wave is at his back. Check out Stick Man…
“Regular” means his stance: left foot forward. If he were goofy (right foot forward) going the same way along the wave, he’d be frontside, with the wave at his front.
Check out the surf slang page for more lingo.