A BigSpin Flip is a Bigspin with a kickflip, this means that the board will spin 360 and flip kickflip while youll be rotation 180 in the air.  You place your feet like the 360flip.  Pop the tail, shove the board with your back foot and flick the board with your front foot so the board spins 360 and spins a full kickflip while you do a body varial in the same direction.  Once the board has spinned 270, catch it and land.  Get a camera and get it on film!