1. Having an orgasm over snow stimulation.
2. Masturbating to snow.
3. Dreaming of snow while not at a snowy location, and thus resulting in an orgasm.
"It was so awesome at heavenly, that I had a snowrgasm..."
"I really need to go to the snow, because I'm having out of control snowrgasms..."
"Wow...that powder just gave me a snowrgasm..."