Evil Knievel's famous jump that broke him. In honor of his baddassness (also a word), Snake River canyon is when you gape a girls asshole and dangle your penis in it while shaking it like a wriggling snake.
I went to April's place last night, and after sperm whaleing in her back door, I gave her a Snake River Canyon for an encore!!
by Dr. Plito D'Awesome May 4, 2009