Rock star and lead singer of band Infant Sorrow from the comedy film Forgetting Sarah Marshall. Played by conedian Russell Brand, he's Sarah Marshall's new boyfriend, a big, douchey eco-singer who's really using the schtick to get laid.
The 2010 film Get Him to the Greek features him as a main character, giving him some depth and backstory.
His name might be a joke reference to the slang term "snow" for cocaine, as in "all this snow."
See also Peter Bretter.