Definitions for "Mctwist"
An inverted 540 degree turn.
An inverted aerial where the rider performs a 540 degree rotational flip. The rider approaches the halfpipe wall riding forward, becomes airborne, rotates 540 degrees in a backside directions while performing a front flip and lands riding forward.
An inverted halfpipe aerial trick, named after skateboarder Mike McGill, in which the rider performs a 540-degree flip. The snowboarder approaches the halfpipe wall riding forward, goes airborne, rotates 540 degrees in a backside direction while doing a front flip, then finished riding forward.