1. A self-appointed minister or who serves to preach to everyone he knows about the virtues of skiing and/or snowboarding as a hobby, and to patronise those who have never been before.
2. Someone who exploits any opportunity to mention skiing, snowboarding, and their achievements thereof.
"I've never heard the words 'snowboarding' and 'awesome' used so many times in a sentence, Tim is such a skivangelist."
"I don't like the heights, or the cold, or extreme sports. So please stop skivangelising."