Not necessarily insulting, but I ahve heard snowboarders described as the crows of the slopes, due to their tendency to settle in chattering groups on the snow, squawking noisily at each other and not really doing much. Except getting in the way of those who have just got off the lift and would actually like to ski!
(Any boarders out there, I am about half-serious! If you have to stop in groups, do it away from the lift and at the edge of the slope. Please!)