snow·skate 
(snōskāt′)
(snōskāt′)n.
A board resembling a small snowboard without bindings, ridden in a standing or crouching position down snow-covered slopes or ramps and often used to perform stunts.
intr.v. snow·skat·ed, snow·skat·ing, snow·skates
To use a snowskate.
snowskat′er n.