Edge
There are 2 possibilities to start a trick:
From the toeside (TS) or the heelside (HS) edge.

Rotation
Backside and Frontside means the direction in which spins are rotated. If you're stance is regular (left foot in front), backside (BS) means that you rotate clockwise and fronside (FS) means that the rotations is done contraclockwise.

Switch
Switch means, that you're riding with the "wrong" foot in front, so if your stance is goofy you have the left foot in front to.

To blind / to revert
To blind means, that the rider is doing a backside 180 degree rotation just before he lands a trick. Performing a trick to revert is nearly the same, but with a 180 degree frontside rotation.