-a frontside rotation is a counter clockwise rotation if you are in a regular stance and a clockwise rotation if you are in a goofy stance.
-a backside rotation is a clockwise rotation if you are in a regular stance and a counter clockwise rotation if you are in a goofy stance.
-fs means frontside
-bs means backside
-the heel side of the deck is the area close to the edge on which your heels usually are when you are standing on your skateboard, I may sometimes use "hs" for heel side.
-the toe side of the deck is the area close to the edge on which your toes usually are when you are standing on your skateboard, I may sometimes use "ts" for toe side.
-"forward" will be the direction your are rolling to when rolling regular or nollie.
-"backward" will be the direection you are coming from when rolling regular or nollie.
-"in front of you" will be the direction you are facing to when you are standing on your deck.
-"behind you" or "in your back" will be the direction your back is facing to.