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1.
The sport of sledging combined with that of kayaking. usually done by students in winter when the rivers are either frozen or too cold to paddle. Involves sliding down a hill in a kayak using your paddle to steer the kayak away from obstacles such as trees and small children
I'm going snowboating in Balloch park this weekend!
by kayaker101 November 28, 2010
 
2.
The act of motorboating after ejaculating on to a woman's breasts.
Jack blew bubbles while snowboating his girlfriend.
by Broke25 December 06, 2009