The tailslide is a move where the tail of the board slides across the lip of the wave. A manoeuvre in which a surfer breaks the fins free from the water so the tail slides around quickly. A very difficult manoeuvre and somewhat counter-intuitive, since it's based on taking weight off the board, not pressurising it. The surfer must stay above the surfboard, staying in physical contact to maintain control. popularised in the early '90s by Kelly Slater and friends.