A Boardslide is when you ollie partially over an object, e.g. a rail, landing with half of your board over it then slide on the middle of your board.
Method[]
Approach the rail or other object you wish to Boardslide on at a slight angle. Then either Ollie then drag the nose of the board towards the object or swipe the tail of the board down in a curve, as if doing a Pop Shove-it, then place your finger back on the board and hold for the duration of the trick. It is possible to do tricks to exit the Boardslide but the easiest exit is to simply slide off the end of the object.
Notes[]
Boardslides are easiest on rails.