What is the spiral-style kick in Australian rules football called?

The spiral-style kick in Australian rules football is called a torpedo punt.

A torpedo punt is struck so that the football spins around its long axis. The spinning motion can make the ball travel farther than a conventional kick, although it also makes the ball’s flight and bounce less predictable.

Players usually hold the ball at an angle before making contact with the instep or laces. The technique was especially associated with long-distance kicking and was once a prominent feature of the sport’s traditional style.

The torpedo punt is different from the drop punt, in which the ball is dropped vertically and kicked end over end. It is also different from the banana kick, which bends sideways through the air. Although modern teams generally favour the more accurate drop punt, torpedo punts still appear in long kicks, set plays and difficult match situations.