Chulksmack(v)- The ability for a Snowboarder to completely tear the shit out of any rail, mountain, park, or pipe and/or that same ability for that rail, mountain, park, or pipe to do the same to the rider.

Literally everyone, ever. Including the writer of this definition.

The act of (in most cases) a snowboard slamming down on a rail creating a "chulk" noise similar to hitting two long, hollow, metal rails together