You lie down on your back on the snow then flap your arms up and down and open/close your legs. The pattern you get in the snow is a 'snowangel'. Living in Hawaii I have never done that but I watch a lot of TV.

that's funny your nickname is snow angel and you don't know its meaning :)

See http://en.wikipedia.org/wiki/Snow_angel

A woman addicted to cocaine can be called "snowangel"? Wow. I have never heard that one!