When a snowboarder gets aroused from the epic weather and other snowboarding conditions. In addition, if a fellow boarder does a totally awesome 1080 rodeo flip, that could lead to a snowboner.
Bro: Dude, we got like 12 feet of snow last night. It's awesome bro. I'm going to triple backflip on my first run. You see all the snow on the mountains brah?
Brah: Bro, your story just gave me a snowboner.